File: datetimepicker.xml

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<?xml version="1.0" encoding="UTF-8"?>
<fpdoc-descriptions>
<package name="datetimectrls">
<!--
====================================================================
DateTimePicker
====================================================================
-->
<module name="DateTimePicker">
<short>
Implements a date/time picker control.
</short>
<descr>
<p>
<file>datetimepicker.pas</file> contains an implementation of a date/time 
picker control patterned after the Delphi VCL control with the same name. 
It contains a cross-platform LCL control which would resemble the VCL 
TDateTimePicker control as much as possible.
</p>
<p>
TDateTimePicker does not use the native Windows control. It is descended from 
the TCustomControl class in order to be cross-platform. It has been tested on 
Windows with Win32/64 and QT widgetsets, as well as on Linux with QT and GTK2 
widgetsets.
</p>
<p>
Please note that the TDateTimePicker control does not descend from TEdit, so 
it does not have the unnecessary caret just like its VCL counterpart.
</p>
<p>
<file>datetimepicker.pas</file> is part of DateTimeCtrls package for Lazarus.
</p>
<p>
<b>Original Author: </b>
</p>
<p>
Zoran Vučenović, January and February 2010.
Зоран Вученовић, јануар и фебруар 2010.
</p>
<p>
<b>LICENSE</b>
</p>
<p>
Modified LGPL -- see the file COPYING.modifiedLGPL.
</p>
<p>
<b>NO WARRANTY</b>
</p>
<p>
There is no warranty whatsoever.
</p>
<p>
Original documentation is located on the Lazarus Wiki at:
</p>
<p>
<url href="https://wiki.freepascal.org/DateTimeCtrls_Package">
DateTimeCtrls Package
</url>
</p>
</descr>

<!-- used units -->
<element name="clocale"/>
<element name="Types"/>
<element name="Classes"/>
<element name="SysUtils"/>
<element name="Math"/>
<element name="DateUtils"/>
<element name="LCLType"/>
<element name="LCLIntf"/>
<element name="LMessages"/>
<element name="Controls"/>
<element name="Graphics"/>
<element name="Buttons"/>
<element name="ExtCtrls"/>
<element name="Forms"/>
<element name="ComCtrls"/>
<element name="Themes"/>
<element name="LazUTF8"/>
<element name="LazMethodList"/>
<element name="LCLCalWrapper"/>
<element name="CalControlWrapper"/>

<element name="NullDate">
<short>
Contains the value used to represent a null or unspecified TDateTime value.
</short>
<descr/>
<seealso/>
</element>

<element name="TheBiggestDate">
<short>
Largest date value that can be entered for the date/time picker control.
</short>
<descr>
<p>
Represents December 31, 9999.
</p>
</descr>
<seealso/>
</element>

<element name="TheSmallestDate">
<short>
Smallest date value that can be entered for the date/time picker control.
</short>
<descr>
<p>
TCalendar does not accept dates before 14. sep. 1752 on Windows OS (see the implementation of TCustomCalendar.SetDateTime). In the Delphi help, it is documented that Windows controls act strangely with dates older than 24. sep. 1752. Actually, TCalendar control has problems displaying dates before 1. okt. 1752. Try putting one calendar on the form, run the application and see what september 1752. looks like.
</p>
<p>
In the LCL, dates behave uniformly as much as possible -- we do not allow dates before 1. okt. 1752. on any OS (even if the platform allows previous dates).
</p>
</descr>
<seealso/>
</element>

<element name="DefaultCalendarWrapperClass">
<short>
Contains the class reference used to create calendar controls for the platform.
</short>
<descr>
<p>
Defaults to TLCLCalendarWrapper if not assigned in the control. Used in the constructor for the calendar form in the implementation.
</p>
</descr>
<seealso/>
</element>

<element name="TYMD">
<short>
Record type used to represent Year, Month, and Day component values in a date.
</short>
<descr>
<p>
Each member is a Word type, and contains values as returned from the 
DecodeDate routine in the FPC RTL. TYMD is used in the implementation of 
TCustomDateTimePicker when the date value is read or modified using properties 
or methods in the control.
</p>
</descr>
<seealso/>
</element>
<element name="TYMD.Year">
<short>
Represents the Year for a date value.
</short>
</element>
<element name="TYMD.Month">
<short>
Represents the Month number for a date value.
</short>
</element>
<element name="TYMD.Day">
<short>
Represents the Day number for a date value.
</short>
</element>

<element name="THMSMs">
<short>
Record type used to represent Hours, Minutes, Seconds, and Milliseconds 
component values in a time.
</short>
<descr/>
<seealso/>
</element>
<element name="THMSMs.Hour">
<short>
Represents the Hour in a time value (using the 24-hour clock).
</short>
</element>
<element name="THMSMs.Minute">
<short>
Represents the Minute in a time value.
</short>
</element>
<element name="THMSMs.Second">
<short>
Represents the Second in a time value.
</short>
</element>
<element name="THMSMs.MiliSec">
<short>
Represents the Milliseconds in a time value.
</short>
</element>

<element name="TDateDisplayOrder">
<short>
Represents the display order for the component values (parts) in a date.
</short>
<descr/>
<seealso/>
</element>
<element name="TDateDisplayOrder.ddoDMY">
<short>
Use Day, Month, Year display order.
</short>
</element>
<element name="TDateDisplayOrder.ddoMDY">
<short>
Use Month, Day, Year display order.
</short>
</element>
<element name="TDateDisplayOrder.ddoYMD">
<short>
Use Year, Month, Day display order.
</short>
</element>
<element name="TDateDisplayOrder.ddoTryDefault">
<short>
Use the display order needed for the default format settings on the platform.
</short>
</element>

<element name="TMonthDisplay">
<short>
Indicates the display format for month names on the calendar dialog form for the control.
</short>
<descr>
<p>
TMonthDisplay is the type used to represent the MonthDisplay property in TCustomDateTimePicker and descendants.
</p>
</descr>
<seealso/>
</element>
<element name="TMonthDisplay.mdShort">
<short>
Uses the short month names in the default format settings for the platform.
</short>
</element>
<element name="TMonthDisplay.mdLong">
<short>
Uses the long month names in the default format settings for the platform.
</short>
</element>
<element name="TMonthDisplay.mdCustom">
<short>
Uses the month names specified in the CustomMonthNames property for the  
date/time picker control.
</short>
</element>

<element name="TTimeDisplay">
<short>
Represents the component values (parts) displayed for a time value.
</short>
<descr>
<p>
TTimeDisplay is the type used to implement the TimeDisplay property in TCustomDateTimePicker and descendants.
</p>
</descr>
<seealso/>
</element>
<element name="TTimeDisplay.tdHM">
<short>
Displays the Hour and Minute parts of a time value.
</short>
</element>
<element name="TTimeDisplay.tdHMS">
<short>
Displays the Hour, Minute, and Second parts of a time value.
</short>
</element>
<element name="TTimeDisplay.tdHMSMs">
<short>
Displays the Hour, Minute, Second, and Millisecond parts of a time value.
</short>
</element>

<element name="TTimeFormat">
<short>
Indicates whether a time value uses a 12-hour or a 24-hour clock.
</short>
<descr/>
<seealso/>
</element>
<element name="TTimeFormat.tf12">
<short>
Causes time values to have AM or PM suffixes.
</short>
</element>
<element name="TTimeFormat.tf24">
<short>
Uses a 24-hour clock for a time value.
</short>
</element>

<element name="TDateTimeKind">
<short>
Indicates whether a date/time picker control displays a date, a time, or both 
values.
</short>
<descr/>
<seealso/>
</element>
<element name="TDateTimeKind.dtkDate">
<short>
Displays a date value on a date/time picker control.
</short>
</element>
<element name="TDateTimeKind.dtkTime">
<short>
Displays a time value on a date/time picker control.
</short>
</element>
<element name="TDateTimeKind.dtkDateTime">
<short>
Displays both a date and a time value on a date/time picker control.
</short>
</element>

<element name="TTextPart">
<short>
Range type which represents the text for the parts in a date/time value.
</short>
<descr>
<p>
Contains the 1-based equivalent for the values TDateTimePart.
</p>
</descr>
<seealso/>
</element>

<element name="TDateTimePart">
<short>
Represents the parts (component values) that can represented in a date/time 
picker control.
</short>
<descr>
<p>
Values from TDateTimePart are stored in the TDateTimePart set type.
</p>
</descr>
<seealso/>
</element>
<element name="TDateTimePart.dtpDay">
<short>
Represents the Day number part of a date.
</short>
</element>
<element name="TDateTimePart.dtpMonth">
<short>
Represents the Month number part of a date.
</short>
</element>
<element name="TDateTimePart.dtpYear">
<short>
Represents the Year number part of a date.
</short>
</element>
<element name="TDateTimePart.dtpHour">
<short>
Represents the Hour part of a time.
</short>
</element>
<element name="TDateTimePart.dtpMinute">
<short>
Represents the Minute part of a time.
</short>
</element>
<element name="TDateTimePart.dtpSecond">
<short>
Represents the Second part of a time.
</short>
</element>
<element name="TDateTimePart.dtpMiliSec">
<short>
Represents the Millisecond part of a time.
</short>
</element>
<element name="TDateTimePart.dtpAMPM">
<short>
Represents the AM or PM suffix in a time using a 12-hour clock.
</short>
</element>

<element name="TDateTimeHidePart">
<short>
Range type for date or time parts (component values) which can be hidden on a 
date/time control.
</short>
<descr/>
<seealso/>
</element>

<element name="TDateTimeParts">
<short>
Set type used to stored values from the TDateTimePart enumeration.
</short>
<descr/>
<seealso/>
</element>

<element name="TEffectiveDateTimeParts">
<short>
Set type used to stored values from the TDateTimePart enumeration which are 
effectively visible on a date/time control.
</short>
<descr/>
<seealso/>
</element>

<element name="TArrowShape">
<short>
Represents arrow shapes which can be drawn for the drop-down button on a 
TDateTimePicker control.
</short>
<descr/>
<seealso/>
</element>
<element name="TArrowShape.asClassicSmaller">
<short>
Uses a small variant of the classic drop-down arrow (filled triangular shape).
</short>
</element>
<element name="TArrowShape.asClassicLarger">
<short>
Uses a larger variant of the classic drop-down arrow (filled triangular 
shape).
</short>
</element>
<element name="TArrowShape.asModernSmaller">
<short>
Uses a small variant of the modern drop-down arrow (single downward chevron).
</short>
</element>
<element name="TArrowShape.asModernLarger">
<short>
Uses a larger variant of the modern drop-down arrow (single downward chevron).
</short>
</element>
<element name="TArrowShape.asYetAnotherShape">
<short>
Uses a filled triangular drop-down arrow with a notched stem.
</short>
</element>
<element name="TArrowShape.asTheme">
<short>
Uses ThemeServices to drawn the shape for the drop-down arrow.
</short>
</element>

<element name="TDTDateMode">
<short>
Represents the drop-down or button mode used for a date value on a 
TDateTimePicker control.
</short>
<descr>
<p>
<var>TDTDateMode</var> is an enumerated type with values that represent the 
button style and display behavior used for a Date value in a date.time picker 
control. TDTDateMode is the type used to implement the DateMode property in 
TCustomDateTimePicker.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DateMode"/>
</seealso>
</element>
<element name="TDTDateMode.dmComboBox">
<short>
Displays a drop-drown button as used in a combo-box control, and opens a calendar dialog to select a date value.
</short>
</element>
<element name="TDTDateMode.dmUpDown">
<short>
Displays up and down buttons to select the value for the select text part in a 
date/time picker control.
</short>
</element>
<element name="TDTDateMode.dmNone">
<short>
Does not display button control(s) on a date/time picker control. Direct entry 
or the Up/Down cursor keys must be used to enter a date value for a date/time picker control.
</short>
</element>

<element name="TDTCalAlignment">
<short>
Represents the alignment options for the calendar dialog on a TDateTimePicker 
control.
</short>
<descr>
<p>
Used when the date/time picker is set to date (dtkDate) or date/time 
(dtkDateTime) kind. A Calendar dialog is not displayed to enter a time value 
for a date/time picker control.
</p>
</descr>
<seealso/>
</element>
<element name="TDTCalAlignment.dtaLeft">
<short>
Aligns the calendar dialog to the left-hand edge of the control.
</short>
</element>
<element name="TDTCalAlignment.dtaRight">
<short>
Aligns the calendar dialog to the right-hand edge of the control.
</short>
</element>
<element name="TDTCalAlignment.dtaDefault">
<short>
Uses the value in BiDiMode to determine the alignment of the calendar dialog 
on the control.
</short>
</element>

<element name="TDateTimePickerOption">
<short>
Identifies the features or behaviors which can be enabled for a 
TDateTimePicker control.
</short>
<descr/>
<seealso/>
</element>
<element name="TDateTimePickerOption.dtpoDoChangeOnSetDateTime">
<short>
The OnChange handler for the control is signalled when the date/time is 
programmatically changed.
</short>
</element>
<element name="TDateTimePickerOption.dtpoEnabledIfUnchecked">
<short>
Enables the date time picker if the check box is unchecked.
</short>
</element>
<element name="TDateTimePickerOption.dtpoAutoCheck">
<short>
Automatically checks an unchecked check box when DateTime is changed.
(Relevant when dtpoEnabledIfUnchecked is set).
</short>
</element>
<element name="TDateTimePickerOption.dtpoFlatButton">
<short>
Draws the button control for the date time picker using a flat appearance.
</short>
</element>
<element name="TDateTimePickerOption.dtpoResetSelection">
<short>
Moves to the first text on the date time picker when it receives focus. The 
control does not remember which part was previously selected.
</short>
</element>

<element name="TDateTimePickerOptions">
<short>
Store values from the TDateTimePickerOption enumeration.
</short>
<descr>
<p>
<var>TDateTimePickerOptions</var> is a set type used to store 0 or more values 
from the TDateTimePickerOption enumeration. The values represent the features 
or behaviors which are enabled for a TDateTimePicker control.
</p>
<p>
TDateTimePickerOptions is the type used to implement the Options property in 
TCustomDateTicker and its descendants.
</p>
</descr>
<seealso>
<link id="TDateTimePickerOption"/>
<link id="TCustomDateTimePicker.Options"/>
</seealso>
</element>

<element name="TCustomDateTimePicker">
<short>
Base class for date/time picker controls.
</short>
<descr>
<p>
<var>TCustomDateTimePicker</var> is a TCustomControl descendant. It is the 
base class for date/time picker controls like TDateTimePicker and 
TDBDateTimePicker. The control allows the user to enter Date, Time, or 
DateTime values. It incorporates a button on the control to display a 
drop-down calendar for date values, or up and down buttons to increment and 
decrement the numeric values in a time. Individual parts in the date/time 
values can be changed using the Up and Down cursor keys, or by entering the 
value directly into the control.
</p>
<p>
TCustomDateTimePicker uses locale-specific settings to format and display 
date/time values by default, but allows these settings to be overridden. 
TCustomDateTimePicker ignores the BiDiMode setting when formatting date and 
time values, but does use the property to align the button(s) on the control.
</p>
</descr>
<seealso>
<link id="TDateTimePicker"/>
<link id="#datetimectrls.dbdatetimepicker.TDBDateTimePicker">TDBDateTimePicker</link>
</seealso>
</element>

<!-- private -->
<element name="TCustomDateTimePicker.cDefOptions"/>
<element name="TCustomDateTimePicker.cCheckBoxBorder"/>
<element name="TCustomDateTimePicker.FAlignment"/>
<element name="TCustomDateTimePicker.FAutoAdvance"/>
<element name="TCustomDateTimePicker.FAutoButtonSize"/>
<element name="TCustomDateTimePicker.FCalAlignment"/>
<element name="TCustomDateTimePicker.FCalendarWrapperClass"/>
<element name="TCustomDateTimePicker.FCascade"/>
<element name="TCustomDateTimePicker.FCenturyFrom"/>
<element name="TCustomDateTimePicker.FEffectiveCenturyFrom"/>
<element name="TCustomDateTimePicker.FChecked"/>
<element name="TCustomDateTimePicker.FDateDisplayOrder"/>
<element name="TCustomDateTimePicker.FHideDateTimeParts"/>
<element name="TCustomDateTimePicker.FEffectiveHideDateTimeParts"/>
<element name="TCustomDateTimePicker.FKind"/>
<element name="TCustomDateTimePicker.FLeadingZeros"/>
<element name="TCustomDateTimePicker.FMonthDisplay"/>
<element name="TCustomDateTimePicker.FMonthNames"/>
<element name="TCustomDateTimePicker.FInitiallyLoadedMonthNames"/>
<element name="TCustomDateTimePicker.FMonthNamesArray"/>
<element name="TCustomDateTimePicker.FCustomMonthNames"/>
<element name="TCustomDateTimePicker.FNullInputAllowed"/>
<element name="TCustomDateTimePicker.FDateTime"/>
<element name="TCustomDateTimePicker.FDateSeparator"/>
<element name="TCustomDateTimePicker.FReadOnly"/>
<element name="TCustomDateTimePicker.FMaxDate"/>
<element name="TCustomDateTimePicker.FMinDate"/>
<element name="TCustomDateTimePicker.FShowMonthNames"/>
<element name="TCustomDateTimePicker.FTextForNullDate"/>
<element name="TCustomDateTimePicker.FTimeSeparator"/>
<element name="TCustomDateTimePicker.FDecimalSeparator"/>
<element name="TCustomDateTimePicker.FTimeDisplay"/>
<element name="TCustomDateTimePicker.FTimeFormat"/>
<element name="TCustomDateTimePicker.FTrailingSeparator"/>
<element name="TCustomDateTimePicker.FUseDefaultSeparators"/>
<element name="TCustomDateTimePicker.FUserChangedText"/>
<element name="TCustomDateTimePicker.FYearPos"/>
<element name="TCustomDateTimePicker.FDayPos"/>
<element name="TCustomDateTimePicker.FMonthPos"/>
<element name="TCustomDateTimePicker.FTextPart"/>
<element name="TCustomDateTimePicker.FTimeText"/>
<element name="TCustomDateTimePicker.FUserChanging"/>
<element name="TCustomDateTimePicker.FDigitWidth"/>
<element name="TCustomDateTimePicker.FTextHeight"/>
<element name="TCustomDateTimePicker.FSeparatorWidth"/>
<element name="TCustomDateTimePicker.FSepNoSpaceWidth"/>
<element name="TCustomDateTimePicker.FShowCheckBox"/>
<element name="TCustomDateTimePicker.FMouseInCheckBox"/>
<element name="TCustomDateTimePicker.FTimeSeparatorWidth"/>
<element name="TCustomDateTimePicker.FDecimalSeparatorWidth"/>
<element name="TCustomDateTimePicker.FMonthWidth"/>
<element name="TCustomDateTimePicker.FNullMonthText"/>
<element name="TCustomDateTimePicker.FSelectedTextPart"/>
<element name="TCustomDateTimePicker.FRecalculatingTextSizesNeeded"/>
<element name="TCustomDateTimePicker.FJumpMinMax"/>
<element name="TCustomDateTimePicker.FAMPMWidth"/>
<element name="TCustomDateTimePicker.FDateWidth"/>
<element name="TCustomDateTimePicker.FTimeWidth"/>
<element name="TCustomDateTimePicker.FTextWidth"/>
<element name="TCustomDateTimePicker.FArrowShape"/>
<element name="TCustomDateTimePicker.FDateMode"/>
<element name="TCustomDateTimePicker.FTextEnabled"/>
<element name="TCustomDateTimePicker.FUpDown"/>
<element name="TCustomDateTimePicker.FOnChange"/>
<element name="TCustomDateTimePicker.FOnCheckBoxChange"/>
<element name="TCustomDateTimePicker.FOnChangeHandlers"/>
<element name="TCustomDateTimePicker.FOnCheckBoxChangeHandlers"/>
<element name="TCustomDateTimePicker.FOnDropDown"/>
<element name="TCustomDateTimePicker.FOnCloseUp"/>
<element name="TCustomDateTimePicker.FEffectiveDateDisplayOrder"/>
<element name="TCustomDateTimePicker.FArrowButton"/>
<element name="TCustomDateTimePicker.FCalendarForm"/>
<element name="TCustomDateTimePicker.FDoNotArrangeControls"/>
<element name="TCustomDateTimePicker.FConfirmedDateTime"/>
<element name="TCustomDateTimePicker.FNoEditingDone"/>
<element name="TCustomDateTimePicker.FAllowDroppingCalendar"/>
<element name="TCustomDateTimePicker.FCorrectedDTP"/>
<element name="TCustomDateTimePicker.FCorrectedValue"/>
<element name="TCustomDateTimePicker.FSkipChangeInUpdateDate"/>
<element name="TCustomDateTimePicker.FOptions"/>

<element name="TCustomDateTimePicker.AreSeparatorsStored"/>
<element name="TCustomDateTimePicker.AreSeparatorsStored.Result"/>
<element name="TCustomDateTimePicker.GetChecked"/>
<element name="TCustomDateTimePicker.GetChecked.Result"/>
<element name="TCustomDateTimePicker.GetDate"/>
<element name="TCustomDateTimePicker.GetDate.Result"/>
<element name="TCustomDateTimePicker.GetDateTime"/>
<element name="TCustomDateTimePicker.GetDateTime.Result"/>
<element name="TCustomDateTimePicker.GetDroppedDown"/>
<element name="TCustomDateTimePicker.GetDroppedDown.Result"/>
<element name="TCustomDateTimePicker.GetTime"/>
<element name="TCustomDateTimePicker.GetTime.Result"/>
<element name="TCustomDateTimePicker.CustomMonthNamesChange"/>
<element name="TCustomDateTimePicker.CustomMonthNamesChange.Sender"/>
<element name="TCustomDateTimePicker.SetAlignment"/>
<element name="TCustomDateTimePicker.SetAlignment.AValue"/>
<element name="TCustomDateTimePicker.SetArrowShape"/>
<element name="TCustomDateTimePicker.SetArrowShape.AValue"/>
<element name="TCustomDateTimePicker.SetAutoButtonSize"/>
<element name="TCustomDateTimePicker.SetAutoButtonSize.AValue"/>
<element name="TCustomDateTimePicker.SetCalAlignment"/>
<element name="TCustomDateTimePicker.SetCalAlignment.AValue"/>
<element name="TCustomDateTimePicker.SetCalendarWrapperClass"/>
<element name="TCustomDateTimePicker.SetCalendarWrapperClass.AValue"/>
<element name="TCustomDateTimePicker.SetCenturyFrom"/>
<element name="TCustomDateTimePicker.SetCenturyFrom.AValue"/>
<element name="TCustomDateTimePicker.SetChecked"/>
<element name="TCustomDateTimePicker.SetChecked.AValue"/>
<element name="TCustomDateTimePicker.CheckTextEnabled"/>

<element name="TCustomDateTimePicker.SetCustomMonthNames"/>
<element name="TCustomDateTimePicker.SetCustomMonthNames.AValue"/>
<element name="TCustomDateTimePicker.SetDateDisplayOrder"/>
<element name="TCustomDateTimePicker.SetDateDisplayOrder.AValue"/>
<element name="TCustomDateTimePicker.SetDateMode"/>
<element name="TCustomDateTimePicker.SetDateMode.AValue"/>
<element name="TCustomDateTimePicker.SetDecimalSeparator"/>
<element name="TCustomDateTimePicker.SetDecimalSeparator.AValue"/>
<element name="TCustomDateTimePicker.SetHideDateTimeParts"/>
<element name="TCustomDateTimePicker.SetHideDateTimeParts.AValue"/>
<element name="TCustomDateTimePicker.SetKind"/>
<element name="TCustomDateTimePicker.SetKind.AValue"/>
<element name="TCustomDateTimePicker.SetLeadingZeros"/>
<element name="TCustomDateTimePicker.SetLeadingZeros.AValue"/>
<element name="TCustomDateTimePicker.SetMonthDisplay"/>
<element name="TCustomDateTimePicker.SetMonthDisplay.AValue"/>
<element name="TCustomDateTimePicker.SetMonthNames"/>
<element name="TCustomDateTimePicker.SetMonthNames.AValue"/>
<element name="TCustomDateTimePicker.SetNullInputAllowed"/>
<element name="TCustomDateTimePicker.SetNullInputAllowed.AValue"/>
<element name="TCustomDateTimePicker.SetDate"/>
<element name="TCustomDateTimePicker.SetDate.AValue"/>
<element name="TCustomDateTimePicker.SetDateTime"/>
<element name="TCustomDateTimePicker.SetDateTime.AValue"/>
<element name="TCustomDateTimePicker.SetDateSeparator"/>
<element name="TCustomDateTimePicker.SetDateSeparator.AValue"/>
<element name="TCustomDateTimePicker.SetMaxDate"/>
<element name="TCustomDateTimePicker.SetMaxDate.AValue"/>
<element name="TCustomDateTimePicker.SetMinDate"/>
<element name="TCustomDateTimePicker.SetMinDate.AValue"/>
<element name="TCustomDateTimePicker.SetReadOnly"/>
<element name="TCustomDateTimePicker.SetReadOnly.AValue"/>
<element name="TCustomDateTimePicker.SetShowCheckBox"/>
<element name="TCustomDateTimePicker.SetShowCheckBox.AValue"/>
<element name="TCustomDateTimePicker.SetShowMonthNames"/>
<element name="TCustomDateTimePicker.SetShowMonthNames.AValue"/>
<element name="TCustomDateTimePicker.SetTextForNullDate"/>
<element name="TCustomDateTimePicker.SetTextForNullDate.AValue"/>
<element name="TCustomDateTimePicker.SetTime"/>
<element name="TCustomDateTimePicker.SetTime.AValue"/>
<element name="TCustomDateTimePicker.SetTimeSeparator"/>
<element name="TCustomDateTimePicker.SetTimeSeparator.AValue"/>
<element name="TCustomDateTimePicker.SetTimeDisplay"/>
<element name="TCustomDateTimePicker.SetTimeDisplay.AValue"/>
<element name="TCustomDateTimePicker.SetTimeFormat"/>
<element name="TCustomDateTimePicker.SetTimeFormat.AValue"/>
<element name="TCustomDateTimePicker.SetTrailingSeparator"/>
<element name="TCustomDateTimePicker.SetTrailingSeparator.AValue"/>
<element name="TCustomDateTimePicker.SetUseDefaultSeparators"/>
<element name="TCustomDateTimePicker.SetUseDefaultSeparators.AValue"/>
<element name="TCustomDateTimePicker.RecalculateTextSizesIfNeeded"/>
<element name="TCustomDateTimePicker.GetHMSMs"/>
<element name="TCustomDateTimePicker.GetHMSMs.Result"/>
<element name="TCustomDateTimePicker.GetHMSMs.NowIfNull"/>
<element name="TCustomDateTimePicker.GetYYYYMMDD"/>
<element name="TCustomDateTimePicker.GetYYYYMMDD.Result"/>
<element name="TCustomDateTimePicker.GetYYYYMMDD.TodayIfNull"/>
<element name="TCustomDateTimePicker.GetYYYYMMDD.WithCorrection"/>
<element name="TCustomDateTimePicker.SetHour"/>
<element name="TCustomDateTimePicker.SetHour.AValue"/>
<element name="TCustomDateTimePicker.SetMiliSec"/>
<element name="TCustomDateTimePicker.SetMiliSec.AValue"/>
<element name="TCustomDateTimePicker.SetMinute"/>
<element name="TCustomDateTimePicker.SetMinute.AValue"/>
<element name="TCustomDateTimePicker.SetSecond"/>
<element name="TCustomDateTimePicker.SetSecond.AValue"/>
<element name="TCustomDateTimePicker.SetSeparators"/>
<element name="TCustomDateTimePicker.SetSeparators.DateSep"/>
<element name="TCustomDateTimePicker.SetSeparators.TimeSep"/>
<element name="TCustomDateTimePicker.SetSeparators.DecSep"/>
<element name="TCustomDateTimePicker.SetDay"/>
<element name="TCustomDateTimePicker.SetDay.AValue"/>
<element name="TCustomDateTimePicker.SetMonth"/>
<element name="TCustomDateTimePicker.SetMonth.AValue"/>
<element name="TCustomDateTimePicker.SetYear"/>
<element name="TCustomDateTimePicker.SetYear.AValue"/>
<element name="TCustomDateTimePicker.SetYYYYMMDD"/>
<element name="TCustomDateTimePicker.SetYYYYMMDD.AValue"/>
<element name="TCustomDateTimePicker.SetHMSMs"/>
<element name="TCustomDateTimePicker.SetHMSMs.AValue"/>
<element name="TCustomDateTimePicker.UpdateIfUserChangedText"/>
<element name="TCustomDateTimePicker.GetSelectedText"/>
<element name="TCustomDateTimePicker.GetSelectedText.Result"/>
<element name="TCustomDateTimePicker.AdjustSelection"/>
<element name="TCustomDateTimePicker.AdjustEffectiveCenturyFrom"/>
<element name="TCustomDateTimePicker.AdjustEffectiveDateDisplayOrder"/>
<element name="TCustomDateTimePicker.AdjustEffectiveHideDateTimeParts"/>
<element name="TCustomDateTimePicker.SelectDateTimePart"/>
<element name="TCustomDateTimePicker.SelectDateTimePart.DateTimePart"/>
<element name="TCustomDateTimePicker.MoveSelectionLR"/>
<element name="TCustomDateTimePicker.MoveSelectionLR.ToLeft"/>
<element name="TCustomDateTimePicker.DestroyCalendarForm"/>
<element name="TCustomDateTimePicker.UpdateShowArrowButton"/>
<element name="TCustomDateTimePicker.DestroyUpDown"/>
<element name="TCustomDateTimePicker.DestroyArrowBtn"/>
<element name="TCustomDateTimePicker.ArrowMouseDown"/>
<element name="TCustomDateTimePicker.ArrowMouseDown.Sender"/>
<element name="TCustomDateTimePicker.ArrowMouseDown.Button"/>
<element name="TCustomDateTimePicker.ArrowMouseDown.Shift"/>
<element name="TCustomDateTimePicker.ArrowMouseDown.X"/>
<element name="TCustomDateTimePicker.ArrowMouseDown.Y"/>
<element name="TCustomDateTimePicker.UpDownClick"/>
<element name="TCustomDateTimePicker.UpDownClick.Sender"/>
<element name="TCustomDateTimePicker.UpDownClick.Button"/>
<element name="TCustomDateTimePicker.SetFocusIfPossible"/>
<element name="TCustomDateTimePicker.AutoResizeButton"/>
<element name="TCustomDateTimePicker.CheckAndApplyKey"/>
<element name="TCustomDateTimePicker.CheckAndApplyKey.Key"/>
<element name="TCustomDateTimePicker.CheckAndApplyKeyCode"/>
<element name="TCustomDateTimePicker.CheckAndApplyKeyCode.Key"/>
<element name="TCustomDateTimePicker.CheckAndApplyKeyCode.ShState"/>
<element name="TCustomDateTimePicker.SetOptions"/>
<element name="TCustomDateTimePicker.SetOptions.aOptions"/>

<!-- protected -->
<element name="TCustomDateTimePicker.WMKillFocus">
<short>
Handles the LM_KILLFOCUS message for the control.
</short>
<descr>
<p>
<var>WMKillFocus</var> is a reintroduced method in 
<var>TCustomDateTimePicker</var>. It ensures that a LM_KILLFOCUS control
message is handled properly when the control loses focus.
</p>
<p>
On Qt, WMKillFocus happens even when focus jumps to another form. This 
behavior differs from Win and Gtk 2 (where it happens only when the focus 
changes to another control on the same form.
</p>
<p>
WMKillFocus ensures that the ancestor method, which calls EditingDone and 
triggers the OnEditingDone event handler, is called only when the active form 
on the screen is not the calendar dialog form for the control. No actions are 
performed in the method when the focus change causes the calendar 
dialog form for the control to be activated.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.WMKillFocus.Message">
<short>
Window message handled in the method.
</short>
</element>

<element name="TCustomDateTimePicker.WMSize">
<short>
Handles the LM_SIZE message for the control.
</short>
<descr>
<p>
<var>WMSize</var> is a reintroduced method in 
<var>TCustomDateTimePicker</var>. It calls the inherited method (from 
TWinControl) on entry to calculate the position and bounds for the control on 
its Parent. It ensures that the button(s) for the control are resized when 
AutoResizeButton is set to <b>True</b>.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.WMSize.Message">
<short>
Window message with the new width and height for the control.
</short>
</element>

<element name="TCustomDateTimePicker.GetControlClassDefaultSize">
<short>
Gets the default dimensions for a new instance of the control.
</short>
<descr/>
<seealso/>
</element>
<element name="TCustomDateTimePicker.GetControlClassDefaultSize.Result">
<short>
TSize instance with the default width and height for a new instance of the 
class.
</short>
</element>

<element name="TCustomDateTimePicker.ConfirmChanges">
<short>
Validates and normalizes changes to date or time parts.
</short>
<descr>
<p>
<var>ConfirmChanges</var> is a method used to validate and normalize changes 
to date or time parts (component values) when a value is modified by the 
end-user.
</p>
<p>
For a date value:
</p>
<p>
If user entered the year as one or two digits, it is adjusted to the range in 
the CenturyFrom, MinDate, and MaxDate properties.
</p>
<p>
For a time value:
</p>
<p>
Changing the value in the AM/PM part causes the Hour to be changed if its 
value is not valid for a 12-hour clock.
</p>
<p>
ConfirmChanges is called from the EditingDone method, and when the value for 
the ReadOnly property is changed.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.UndoChanges">
<short>
Reverts changes to the DateTime value for the control.
</short>
<descr>
<p>
<var>UndoChanges</var> is a method used to revert the DateTime property to its 
original value when editing is cancelled by the user. 
</p>
<p>
UndoChanges is called when the VK_ESCAPE (Escape) key is handled for the 
control. It is also called from the UpdateDate method when an exception is 
handled while setting the date value for the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.DropDownCalendarForm">
<short>
Creates and displays the drop-down calendar dialog for the control.
</short>
<descr>
<p>
<var>DropDownCalendarForm</var> ensures that the form instance in the 
<var>CalendarForm</var> property is allocated, configured, and displayed. 
CalendarForm is the form the where the embedded calendar/time picker for the 
control is displayed, and its value is assigned in the method when:
</p>
<ul>
<li>
The control does not already have an assigned form instance in CalendarForm.
</li>
<li>
Checked is set to <b>True</b>, or <var>dtpoEnabledIfUnchecked</var> has been enabled in <var>Options</var> property.
</li>
<li>
The control is not configured as <var>ReadOnly</var>.
</li>
</ul>
<p>
The value in CalendarForm is not updated and the form is not displayed at 
design-time.
</p>
<p>
DropDownCalendarForm is called when the drop-down button is clicked, or the 
Alt+Down cursor key is pressed in the edit for the control.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.CalendarForm"/>
<link id="TCustomDateTimePicker.Checked"/>
<link id="TCustomDateTimePicker.Options"/>
<link id="TCustomDateTimePicker.ReadOnly"/>
<link id="TDateTimePickerOptions"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.GetCheckBoxRect">
<short>
Gets the rectangle where the check box for the control is drawn.
</short>
<descr>
<p>
Use ShowCheckBox to enable display of the check box for a date or date/time 
value on the control.
</p>
<p>
GetCheckBoxRect is called from the GetTextOrigin, MouseDown, MouseMove, and 
Paint methods when ShowCheckBox is enabled.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.ShowCheckBox"/>
<link id="TCustomDateTimePicker.GetTextOrigin"/>
<link id="TCustomDateTimePicker.MouseDown"/>
<link id="TCustomDateTimePicker.MouseMove"/>
<link id="TCustomDateTimePicker.Paint"/>
</seealso>
</element>
<element name="TCustomDateTimePicker.GetCheckBoxRect.Result">
<short>
TRect instance with the bounds for the check box within the client area for 
the control.
</short>
</element>
<element name="TCustomDateTimePicker.GetCheckBoxRect.IgnoreRightToLeft">
<short>
<b>True</b> causes the value in IsRightToLeft to be ignored, and the check box 
is drawn on the left-hand side of the control.
</short>
</element>

<element name="TCustomDateTimePicker.GetDateTimePartFromTextPart">
<short>
Gets the date/time part (TDateTimePart) for the specified text part 
(TTextPart).
</short>
<descr>
<p>
Converts the 1-based text part number to the 0-based value used in the 
TDateTimePart enumeration. Converts the ordinal value to match the display 
order specified in the DateDisplayOrder property.
</p>
<p>
Called from the GetSelectedDateTimePart method to get the selected text part 
in the control. Called from the MoveSelectionLR method to ensure that only 
date/time parts which are visible can be accessed using cursor key navigation.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.GetDateTimePartFromTextPart.Result">
<short>
TDateTimePart value for the specified text part.
</short>
</element>
<element name="TCustomDateTimePicker.GetDateTimePartFromTextPart.TextPart">
<short>
Indicates the 1-based position for a text element displayed on the control.
</short>
</element>

<element name="TCustomDateTimePicker.GetSelectedDateTimePart">
<short>
Returns the part of the date/time value which is currently selected on the 
control.
</short>
<descr>
<p>
<var>GetSelectedDateTimePart</var> is a <var>TDateTimePart</var> function 
which returns the currently selected part (or component value) on the date/
time picker control. The control can potentially display the values for 8 
different segments in a date/time value: Year, Month, Day, Hour, Minute, 
Second, Millisecond, and an AM/PM indicator. These values are displayed based 
on the visibility and order indicated in properties like Kind, 
DateDisplayOrder, TimeDisplay, and TimeFormat.
</p>
<p>
GetSelectedDateTimePart calls GetDateTimePartFromTextPart to get the return 
value for the method using the position for the currently selected text 
segment. The return value is an ordinal position for the component value 
independent of the visibility or display order for the text values. See <link 
id="TDateTimePart">TDateTimePart</link> for the values in the enumeration and 
their meanings.
</p>
<p>
GetSelectedDateTimePart is called from methods which navigate between the 
visible text segments, like: SelectDate, SelectTime, and 
SelectTextPartUnderMouse. It is also called when user changes are validated 
and applied to the date/time value for the control.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.GetSelectedDateTimePart.Result">
<short>
TDateTimePart enumeration value for the currently selected text part.
</short>
</element>

<element name="TCustomDateTimePicker.FontChanged">
<short>
Performs actions needed when the Font for the control has been changed.
</short>
<descr>
<p>
<var>FontChanged</var> is an overridden method in 
<var>TCustomDateTimePicker</var>. It ensures that the internal flag used to 
trigger recalculation of the sizes for text parts for the control is enabled. 
It calls the inherited method (in TCustomControl) prior to exiting from the 
method.
</p>
<p>
FontChanged is the routine used as the OnChange event handler for the Font 
property, and is assigned in the inherited constructor for the class instance.
</p>
<p>
FontChanged ensures that the new value for the Font property is also applied 
to the Canvas for the control. This includes the PixelsPerInch setting for the 
Font.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.FontChanged.Sender">
<short>
The object instance for the event notification.
</short>
</element>

<element name="TCustomDateTimePicker.GetTextOrigin">
<short>
Returns the upper-left corner of the rectangle where the text for the control 
is drawn.
</short>
<descr>
<p>
The origin is offset for the InnerBorder used in BorderSpacing and the 
BorderWidth for the control. When ShowCheckBox is enabled, the origin is 
offset by the size for the check box including its border. If the control has 
a visible button, like the drop-down or up/down buttons, the client width is 
adjusted by the required amount. The Alignment property is also taken into 
consideration when the left edge in the return value is calculated.
</p>
<p>
GetTextOrigin is also used in calculating the preferred size for the control.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.GetTextOrigin.Result">
<short>
TPoint instance with the upper-left corner where the text for the control is 
drawn.
</short>
</element>
<element name="TCustomDateTimePicker.GetTextOrigin.IgnoreRightToLeft">
<short>
Ignores the value in IsRightToLeft when the origin for the text is determined.
</short>
</element>

<element name="TCustomDateTimePicker.KeyDown">
<short>
Signals OnKeyDown event handlers (when assigned) and applies keys specific to 
the date/time picker control. 
</short>
<descr>
<p>
<var>KeyDown</var> is an overridden method in 
<var>TCustomDateTimePicker</var>. When the text parts or buttons are enabled 
for the control, the inherited method is called to signal assigned OnKeyDown 
event handlers using the values in <var>Key</var> and <var>Shift</var>.
</p>
<p>
If Key is not handled by an event handler, a private method is called to check 
and apply the keys specific to the control. The keys include the following:
</p>
<dl>
<dt>VK_SPACE</dt>
<dd>Toggles the state for the check box when ShowCheckBox is enabled.</dd>
<dt>VK_LEFT</dt>
<dd>Moves the selection to the previous text part on the control.</dd>
<dt>VK_RIGHT</dt>
<dd>Moves the selection to the next text part on the control.</dd>
<dt>
VK_OEM_COMMA, VK_OEM_PERIOD, VK_DIVIDE, VK_OEM_MINUS, VK_SEPARATOR, 
VK_DECIMAL, VK_SUBTRACT
</dt>
<dd>Moves the text selection to the next text part on the control.</dd>
<dt>VK_UP</dt>
<dd>
Increments the value in the currently selected text part. The check box is 
checked when ShowCheckBox is enabled or dtpoAutoCheck is included in the 
Options for the control.
</dd>
<dt>VK_DOWN</dt>
<dd>
If Shift contains ssAlt and the drop-down button is assigned, the calendar 
dialog  for the control is displayed. Otherwise, the value in the currently 
selected text part is decremented. The check box is checked when ShowCheckBox 
is enabled or dtpoAutoCheck is included in the Options for the control.
</dd>
<dt>VK_RETURN</dt>
<dd>
Calls the Editingdone method when ReadOnly is not enabled for the control.
</dd>
<dt>VK_ESCAPE</dt>
<dd>
Calls UndoChanges and EditingDOne when ReadOnly is not enabled for the control.
</dd>
<dt>VK_N</dt>
<dd>
Sets the DateTime property to the NullDate value when ReadOnly is not enabled 
for the control.
</dd>
</dl>
<p>
The Key argument is set to 0 (VK_UNKNOWN) if the Key is handled in an 
OnKeyDown event handler or handled internally by the control.
</p>
<p>
KeyDown is called from the KeyDownBeforeInterface method. It occurs after the 
Application, any forms with KeyPreview enabled, and the active DragManager 
have examined and possibly handled the key event.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TWinControl.OnKeyDown">TWinControl.OnKeyDown</link>
<link id="#lcl.controls.TWinControl.KeyDown">TWinControl.KeyDown</link>
<link id="#lcl.controls.TWinControl.KeyUp">TWinControl.KeyUp</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.KeyDown.Key">
<short>
Virtual key code for the key down event.
</short>
</element>
<element name="TCustomDateTimePicker.KeyDown.Shift">
<short>
Shift, Ctrl, or Alt modifier for the key down event.
</short>
</element>

<element name="TCustomDateTimePicker.KeyPress">
<short>
Validates and applies the specified character to the control.
</short>
<descr>
<p>
<var>KeyPress</var> is an overridden method in 
<var>TCustomDateTimePicker</var>. It ensures that an internal update flag is 
maintained when the specified character is validated and applied to the 
control.
</p>
<p>
KeyPress calls the inherited method to signal the OnKeyPress event handler 
(when assigned). If Key is not set to VK_UNKNOWN (0) in the event handler, it 
is checked for the alphanumeric values allowed for the selected text part on 
the control and applied when ReadOnly is not set to True. UpdateDate is called 
to apply the new value for the DateTime property. The currently selected text 
part may be changed when a text segment is completely filled and AutoAdvance 
is enabled.
</p>
<p>
KeyPress is called from the DoKeyPress method when the parent form does not 
have KeyPreview enabled or does not handle the character code in Key. KeyPress 
is not called if csNoStdEvents has been included in the ControlStyle property.
</p>
<p>
See <var>UTF8KeyPress</var> for the actions performed for a UTF-8-encoded 
character in a key press.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.KeyPress.Key">
<short>
Character examined and applied in the method.
</short>
</element>

<element name="TCustomDateTimePicker.SelectTextPartUnderMouse">
<short>
Determines which text part should be selected in response to mouse message.
</short>
<descr>
<p>
Used in MouseDown and DoMouseWheel methods.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.SelectTextPartUnderMouse.XMouse">
<short>
Horizontal coordinate for the mouse pointer. Translated to a value relative to 
the text origin in the method.
</short>
</element>

<element name="TCustomDateTimePicker.MouseLeave">
<short>
Performs actions needed when the mouse pointer leaves the client rectangle 
for the control.
</short>
<descr>
<p>
<var>MouseLeave</var> is an overridden method in 
<var>TCustomDateTimePicker</var>. It calls the inherited method on entry to 
signal the OnMouseLeave event handler (when assigned). MouseLeave ensures that 
the internal flag which tracks whether the mouse pointer is in the check box 
for the control is reset. The Invalidate method is called and causes the 
control to be redrawn.
</p>
<p>
MouseLeave is called from the CMMouseLeave method when a CM_MOUSELEAVE message 
is handled for the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.MouseMove">
<short>
Performs actions needed when a mouse move event is handled for the control.
</short>
<descr>
<p>
<var>MouseMove</var> is an overridden method in 
<var>TCustomDateTimePicker</var>. It calls the inherited method on entry to 
update the drag manager (when active) and signals the OnMouseMove event 
handler (when assigned). It ensures that the internal flag used to track 
whether the mouse is in the check box for the control is updated when 
ShowCheckBox is enabled. The Invalidate method is called to redraw the control.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.MouseMove.Shift">
<short>
Shift, Ctrl, or Alt modifier for the mouse event.
</short>
</element>
<element name="TCustomDateTimePicker.MouseMove.X">
<short>
Horizontal coordinate for the mouse pointer.
</short>
</element>
<element name="TCustomDateTimePicker.MouseMove.Y">
<short>
Vertical coordinate for the mouse pointer.
</short>
</element>

<element name="TCustomDateTimePicker.MouseDown">
<short>
Performs actions needed when a mouse down event is handled for the control.
</short>
<descr>
<p>
<var>MouseDown</var> is an overridden method in TCustomDateTimePicker. It 
ensures that the check box state is toggled if it is visible (ShowCheckBox is 
<b>True</b>) and the mouse is over the check box. If the mouse pointer is over 
one of the text parts, SelectTextPartUnderMouse is called to select the text 
value at the X coordinate. The control is focused if the Parent form can be 
given focus and allows tab navigation.
</p>
<p>
MouseDown calls the inherited method to activate the control, pass the mouse 
event to an active drag manager, and signal the OnMouseDown event handler 
(when assigned).
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.MouseDown.Button">
<short>
Mouse button for the event.
</short>
</element>
<element name="TCustomDateTimePicker.MouseDown.Shift">
<short>
Shift, Ctrl, or Alt modifier for the mouse event.
</short>
</element>
<element name="TCustomDateTimePicker.MouseDown.X">
<short>
Horizontal coordinate for the mouse down event.
</short>
</element>
<element name="TCustomDateTimePicker.MouseDown.Y">
<short>
Vertical coordinate for the mouse down event.
</short>
</element>

<element name="TCustomDateTimePicker.DoMouseWheel">
<short>
Signals the OnMouseWheel handlers, when the mouse wheel has been turned.
</short>
<descr>
<p>
<var>DoMouseWheel</var> is an overridden method in TCustomDateTimePicker. It 
ensures that the selected text part for the control is updated when the 
control is Enabled. 
</p>
<p>
WheelDelta determines whether the selected text part is incremented or 
decremented; it is incremented when WheelDelta is a positive integer value or 
0.
</p>
<p>
DoMouseWheel do not call the inherited method - so it does not signal the 
OnMouseWheel, OnMouseWheelUp, or OnMouseWheelDown event handlers. 
</p>
<p>
The return value is True if the value in the selected text part was changed in 
the method.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.DoMouseWheel.Result">
<short>
Returns <b>True</b> if the value in the selected text part (and the DateTime 
value) are updated in the method.
</short>
</element>
<element name="TCustomDateTimePicker.DoMouseWheel.Shift">
<short>
Shift, Ctrl, or Alt modifier for the mouse wheel event.
</short>
</element>
<element name="TCustomDateTimePicker.DoMouseWheel.WheelDelta">
<short>
Direction and amount that the mouse wheel was moved. Negative values for a  
mouse wheel down event. Positive values (or 0) for a mouse wheel up event.
</short>
</element>
<element name="TCustomDateTimePicker.DoMouseWheel.MousePos">
<short>
TPoint instance with the coordinates for the mouse pointer when the wheel 
event was detected.
</short>
</element>

<element name="TCustomDateTimePicker.UpdateDate">
<short>
Updates the control when the date value or the visual appearance for the 
control has been changed.
</short>
<descr>
<p>
UpdateDate ensures that DateTime is in the range specified by the MinDate and 
MaxDate properties.
</p>
<p>
Calls the Change method if the user entered the value for the control, or 
dtpoDoChangeOnSetDateTime has been included in the Options property.
</p>
<p>
Gets the values for the visible text parts on the control. This includes 
clearing the values displayed for the text parts when DateIsNull returns 
<b>True</b>.
</p>
<p>
Invalidate is called and the control is subsequently redrawn.
</p>
<p>
UpdateDate is called when the values in DateTime, DateDisplayOrder, 
MonthDisplay, ShowMonthName, or LeadingZeros is changed for the control. It is 
also called when UndoChanges is called, when the hidden date/time parts are 
(re-)determined, and when character keys are applied to the selected text part 
for the control.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.UpdateDate.CallChangeFromSetDateTime">
<short>
<b>True</b> if the OnChange event handler should be signalled when a value is 
assigned to the DateTime property.
</short>
</element>

<element name="TCustomDateTimePicker.DoEnter">
<short>
Resets the selected text part (when needed) and signals the OnEnter event 
handler (when assigned) when the control receives focus.
</short>
<descr>
<p>
<var>DoEnter</var> is an overridden method in 
<var>TCustomDateTimePicker</var>. It resets the internal member used to track 
the selected text part when dtpoResetSelection has been included in the 
Options property. DoEnter calls the inherited method (in TWinControl) to 
signal the OnEnter event handler (when assigned). Invalidate is called and 
the control is subsequently redrawn.
</p>
<p>
DoEnter is called from the CMEnter method when a CM_ENTER message is received 
for the control. This occurs when when the control receives focus, either by 
using keyboard navigation or by mouse click in the client area for the control.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Options"/>
<link id="TCustomDateTimePicker.DoExit"/>
<link id="#lcl.controls.TWinControl.Invalidate">TWinControl.Invalidate</link>
<link id="#lcl.controls.TWinControl.CMEnter">TWinControl.CMEnter</link>
<link id="#lcl.controls.TWinControl.OnEnter">TWinControl.OnEnter</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.DoExit">
<short>
Performs actions needed when the control loses focus.
</short>
<descr>
<p>
<var>DoExit</var> is an overridden method in TCustomDateTimePicker. It calls 
the inherited method on entry to signal the OnExit event handler (if assigned) 
when the control loses focus. It calls Invalidate to redraw the control.
</p>
<p>
DoExit is called from the CMExit method when a CM_EXIT message is received for 
the control. It allows actions to be performed when the control loses focus, 
either by using keyboard navigation or by mouse click in the client area for 
another control.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TWinControl.DoExit">TWinControl.DoExit</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.Click">
<short>
Performs actions needed when the control is clicked.
</short>
<descr>
<p>
<var>Click</var> is an overridden method in TCustomDateTimePicker called when 
the control has been clicked using the mouse or its keyboard equivalent. It 
ensures the inherited method (in TControl) is not called if the control is not 
Enabled.
</p>
<p>
No actions are performed in the method if Enabled contains False or when 
ShowCheckBox is enabled but not Checked.
</p>
<p>
Click signals the OnClick event handler and/or executes the ActionLink when 
the control has been clicked.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TControl.Click">TControl.Click</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.DblClick">
<short>
Performs actions needed when the control is double clicked.
</short>
<descr>
<p>
<var>DblClick</var> is an overridden method in TCustomDateTimePicker. It 
ensures that the inherited method (in TControl) is <b>not</b> called if the 
control or its text parts are not Enabled. The inherited method signals the 
OnDblClick event handler (when assigned).
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Checked"/>
<link id="TCustomDateTimePicker.Options"/>
<link id="TDateTimePickerOptions"/>
<link id="#lcl.controls.TControl.Enabled">TControl.Enabled</link>
<link id="#lcl.controls.TControl.DblClick">TControl.DblClick</link>
<link id="#lcl.controls.TControl.OnDblClick">TControl.OnDblClick</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.MouseUp">
<short>
Performs actions needed when a held mouse button is released over the control.
</short>
<descr/>
<seealso/>
</element>
<element name="TCustomDateTimePicker.MouseUp.Button">
<short>
Mouse button for the event.
</short>
</element>
<element name="TCustomDateTimePicker.MouseUp.Shift">
<short>
Shift, Ctrl, or Alt modifier for the mouse event.
</short>
</element>
<element name="TCustomDateTimePicker.MouseUp.X">
<short>
Horizontal coordinate for the mouse pointer.
</short>
</element>
<element name="TCustomDateTimePicker.MouseUp.Y">
<short>
Vertical coordinate for the mouse pointer.
</short>
</element>

<element name="TCustomDateTimePicker.KeyUp">
<short>
Handles a key up notification for the control.
</short>
<descr>
<p>
<var>KeyUp</var> is an overridden method in TCustomDateTimePicker. It ensures 
that the inherited method is called only when the control and its text parts 
are Enabled, and a visible check box on the control is in the Checked state. 
The inherited method (in TWinControl) signals the OnKeyUp event handler (when 
assigned) using the values in Key and Shift as arguments.
</p>
<p>
KeyUp is called from the KeyUpBeforeInterface method. It occurs after forms 
with KeyPreview enabled or the active DragManager have examined and possibly 
handled the key event.
</p>
<p>
See KeyDown for the actions performed when the key down event has occurred.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TKeyEvent">TKeyEvent</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.KeyUp.Key">
<short>
Virtual key code for the key up notification.
</short>
</element>
<element name="TCustomDateTimePicker.KeyUp.Shift">
<short>
Shift, Ctrl, or Alt modifiers for the key up notification.
</short>
</element>

<element name="TCustomDateTimePicker.UTF8KeyPress">
<short>
Handles a key press notification for the specified UTF-8-encoded character 
value.
</short>
<descr>
<p>
<var>UTF8KeyPress</var> is an overridden method in TCustomDateTimePicker. It 
ensures that the inherited method is called only when the control and its text 
parts are Enabled, and a visible check box on the control is in the Checked 
state. The inherited method (in TWinControl) signals the OnUTF8KeyPress event 
handler (when assigned).
</p>
<p>
UTF8KeyPress is called from the DoUTF8KeyPress method when the parent form 
does not have KeyPreview enabled or does not handle the character code in Key. 
UTF8KeyPress is not called if csNoStdEvents has been included in the 
ControlStyle property.
</p>
<p>
The handler routine in OnUTF8KeyPress can modify the value in the Key 
argument. It can set Key to an empty string if it is handled in the routine.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.UTF8KeyPress.UTF8Key">
<short>
UTF-8-encoded character examined and potentially handled in the method.
</short>
</element>

<element name="TCustomDateTimePicker.CalculatePreferredSize">
<short>
Calculates the preferred width and height for the control including space for 
the visible button(s).
</short>
<descr>
<p>
<var>CalculatePreferredSize</var> is an overridden method in 
TCustomDateTimePicker. It reimplements the method from the TWinControl 
ancestor, and does <b>not</b> call the inherited method.
</p>
<p>
CalculatePreferredSize measures and stores the widths for the text parts on 
the control (when needed), and determines the preferred size for the control 
within the ClientWidth and ClientHeight. If there are visible button(s) on the 
control, like the drop-down indicator or the up/down buttons, the width of the 
visible is added to the preferred width.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.CalculatePreferredSize.PreferredWidth">
<short>
Preferred width in pixels for the text and buttons on the control.
</short>
</element>
<element name="TCustomDateTimePicker.CalculatePreferredSize.PreferredHeight">
<short>
Preferred height in pixels for the text and buttons on the control.
</short>
</element>
<element name="TCustomDateTimePicker.CalculatePreferredSize.WithThemeSpace">
<short>
Not used in the method.
</short>
</element>

<element name="TCustomDateTimePicker.SetBiDiMode">
<short>
Sets the value for the BidiMode property.
</short>
<descr>
<p>
Calls the inherited method to update the property value. Calls ArrangeCtrls to 
anchor and align the text parts and button(s) on the control.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TControl.BiDiMode">TControl.BiDiMode</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.SetBiDiMode.AValue">
<short>
New value for the BiDiMode property.
</short>
</element>

<element name="TCustomDateTimePicker.Loaded">
<short>
Performs actions needed when the component has been loaded using the LCL 
streaming mechanism.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.MonthDisplay"/>
<link id="TCustomDateTimePicker.MonthNames"/>
<link id="TCustomDateTimePicker.CustomMonthNames"/>
<link id="#lcl.controls.TWinControl.Loaded">TWinControl.Loaded</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseCurrentTextPart">
<short>
Increments the internal member used to track the selected text part in the 
control.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseCurrentTextPart">
<short>
Decrements the internal member used to track the selected text part in the 
control.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseMonth">
<short>
Increments the month number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseYear">
<short>
Increments the year number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseDay">
<short>
Increments the day number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseMonth">
<short>
Decrements the month number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseYear">
<short>
Decrements the year number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseDay">
<short>
Decrements the day number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseHour">
<short>
Increments the hour number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseMinute">
<short>
Increments the minute number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseSecond">
<short>
Increments the second number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.IncreaseMiliSec">
<short>
Increments the millisecond number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseHour">
<short>
Decrements the hour number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseMinute">
<short>
Decrements the minute number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseSecond">
<short>
Decrements the second number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DecreaseMiliSec">
<short>
Decrements the millisecond number in the DateTime value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.ChangeAMPM">
<short>
Toggles between the 'AM' and 'PM' values and updates the hour in the DateTime 
value accordingly.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DoMouseWheel"/>
<link id="TCustomDateTimePicker.KeyDown"/>
<link id="TCustomDateTimePicker.KeyPress"/>
<link id="TCustomDateTimePicker.SendExternalKey"/>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectDay">
<short>
Changes the selected text part to the date/time part representing the day 
number.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectMonth">
<short>
Changes the selected text part to the date/time part representing the month.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectYear">
<short>
Changes the selected text part to the date/time part representing the year 
number.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectHour">
<short>
Changes the selected text part to the date/time part representing the hour 
number.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectMinute">
<short>
Changes the selected text part to the date/time part representing the minute 
number.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectSecond">
<short>
Changes the selected text part to the date/time part representing the second 
number.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectMiliSec">
<short>
Changes the selected text part to the date/time part representing the 
millisecond value.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectAMPM">
<short>
Changes the selected text part to the date/time part representing the AM/PM 
indicator.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTextPartUnderMouse"/>
<link id="TCustomDateTimePicker.ConfirmChanges"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SetEnabled">
<short>
Sets the value for the Enabled property.
</short>
<descr>
<p>
<var>SetEnabled</var> is the overridden write specifier for the 
<var>Enabled</var> property. It ensures that the button(s) and internal flags 
for the control are updated when the property value has been changed. It calls 
the Invalidate method to redraw the control after the changes have been 
applied.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TControl.Enabled">TControl.Enabled</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.SetEnabled.Value">
<short>
New value for the Enabled property.
</short>
</element>

<element name="TCustomDateTimePicker.SetAutoSize">
<short>
Sets the value for the AutoSize property.
</short>
<descr>
<p>
<var>SetAutoSize</var> is the overridden write specifier for the AutoSize 
property. It ensures that the InvalidatePreferredSize method is called before 
the value in the property is changed to True. It calls the inherited method 
prior to exit to apply the new value for the property.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.AutoSize"/>
</seealso>
</element>
<element name="TCustomDateTimePicker.SetAutoSize.Value">
<short>
New value for the AutoSize property.
</short>
</element>

<element name="TCustomDateTimePicker.CreateWnd">
<short>
Creates the handle for the widgetset class instance.
</short>
<descr>
<p>
<var>CreateWnd</var> is an overridden method in TCustomDateTimePicker. It is 
needed to prevent a crash on Linux at design-time when anchoring child 
controls in the constructor. Anchoring of child controls has been moved to the 
ArrangeCtrls method and blocked until CreateWnd has been called. A boolean 
member was added (FDoNotArrangeControls) for the purpose and is set to 
<b>False</b> in the CreateWnd override after the inherited method is 
called. This allows ArrangeCtrls to safely perform anchoring for the child 
controls while ensuring the widget handle is valid.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TWinControl.CreateWnd">TWinControl.CreateWnd</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.SetDateTimeJumpMinMax">
<short>
Sets the value for the internal member which tracks assignments using the 
MinDate or MaxDate values.
</short>
<descr/>
<seealso/>
</element>
<element name="TCustomDateTimePicker.SetDateTimeJumpMinMax.AValue">
<short>
Value assigned to DateTime.
</short>
</element>

<element name="TCustomDateTimePicker.ArrangeCtrls">
<short>
Anchors, aligns and resizes the control and its button(s).
</short>
<descr>
<p>
Called when the value in BiDiMode or ShowCheckBox is changed, and when the 
window handle is created for the control in CreateWnd method.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.Change">
<short>
Signals the OnChange event handlers assigned to the control when the DateTime 
value has been changed.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.UpdateDate"/>
<link id="TCustomDateTimePicker.OnChange"/>
<link id="TCustomDateTimePicker.AddHandlerOnChange"/>
<link id="TCustomDateTimePicker.RemoveHandlerOnChange"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.CheckBoxChange">
<short>
Signals the OnCheckBoxChange event handlers assigned for the control when the 
value in Checked has been changed.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.Checked"/>
<link id="TCustomDateTimePicker.OnCheckBoxChange"/>
<link id="TCustomDateTimePicker.AddHandlerOnCheckBoxChange"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DoDropDown">
<short>
Signals the OnDropDown event handler when the drop-down calendar dialog is 
displayed for the control.
</short>
<descr>
<p>
Occurs when the dialog form for the drop-down calendar is displayed.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.OnDropDown"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DoCloseUp">
<short>
Signals the OnCloseUp event handler (when assigned) when the drop-down 
calendar dialog is closed for the control.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.OnCloseUp"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DoAutoCheck">
<short>
Sets the value in Checked to <b>True</b> when auto-check is enabled in the 
Options for the control.
</short>
<descr>
<p>
Called when a new Date is selected on the drop-down calendar dialog and when 
keys applied to the control result in a new Date or Time value.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Checked"/>
<link id="TCustomDateTimePicker.Options"/>
<link id="TCustomDateTimePicker.Date"/>
<link id="TCustomDateTimePicker.Time"/>
<link id="TDateTimePickerOptions"/>
<link id="TDateTimePickerOption"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DoAutoAdjustLayout">
<short>
Applies an automatic layout policy and scaling proportions to the control.
</short>
<descr>
<p>
<var>DoAutoAdjustLayout</var> is an overridden method in 
TCustomDateTimePicker. It calls the inherited method on entry to resize the 
control using the specified layout policy and scaling factors. It ensures that 
the width for drop-down or up/down button on the control is scaled from its 
default value to the PPI setting used in the Font.
</p>
<p>
Font scaling is performed in AutoAdjustLayout (when needed) and occurs prior 
to calling DoAutoAdjustLayout.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TControl.DoAutoAdjustLayout">TControl.DoAutoAdjustLayout</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.DoAutoAdjustLayout.AMode">
<short>
Automatic layout policy applied in the method. It is a value from the 
TLayoutAdjustmentPolicy enumeration, and determines whether horizontal / 
vertical / or both sizes are adjusted in the method. It generally reflects the 
constraints for the device type where the application is running.
</short>
</element>
<element name="TCustomDateTimePicker.DoAutoAdjustLayout.AXProportion">
<short>
Scaling factor applied to the horizontal size in the control.
</short>
</element>
<element name="TCustomDateTimePicker.DoAutoAdjustLayout.AYProportion">
<short>
Scaling factor applied to the vertical size in the control.
</short>
</element>

<element name="TCustomDateTimePicker.AddHandlerOnChange">
<short>
Adds the specified handler routine to the internal list of OnChange event 
handlers for the control.
</short>
<descr>
<p>
<var>AddHandlerOnChange</var> ensures that the internal TMethodList for the 
class instance has been allocated, and calls its Add method using the 
specified argument values.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.AddHandlerOnChange.AOnChange">
<short>
Handler routine added to the handler list in the method.
</short>
</element>
<element name="TCustomDateTimePicker.AddHandlerOnChange.AsFirst">
<short>
<b>True</b> if the handler routine is stored as the first handler in the list. 
<b>False</b> if it is appended to end of the list.
</short>
</element>

<element name="TCustomDateTimePicker.AddHandlerOnCheckBoxChange">
<short>
Adds the specified handler routine to the internal list of OnCheckBoxChange 
events handlers for the control.
</short>
<descr>
<p>
<var>AddHandlerOnCheckBoxChange</var> ensures that the internal TMethodList 
for the class instance has been allocated, and calls its Add method using the 
specified argument values.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.AddHandlerOnCheckBoxChange.AOnCheckBoxChange">
<short>
Handler routine added to the handler list in the method.
</short>
</element>
<element name="TCustomDateTimePicker.AddHandlerOnCheckBoxChange.AsFirst">
<short>
<b>True</b> if the handler routine is stored as the first handler in the list. 
<b>False</b> if it is appended to end of the list.
</short>
</element>

<element name="TCustomDateTimePicker.RemoveHandlerOnChange">
<short>
Removes the specified OnChange handler routine from the internal list for the 
handler type.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.AddHandlerOnChange"/>
</seealso>
</element>
<element name="TCustomDateTimePicker.RemoveHandlerOnChange.AOnChange">
<short>
Handler routine removed in the method.
</short>
</element>

<element name="TCustomDateTimePicker.RemoveHandlerOnCheckBoxChange">
<short>
Removes the specified OnCheckBoxChange handler routine from the internal list 
for the handler type.
</short>
<descr/>
<seealso/>
</element>
<element name="TCustomDateTimePicker.RemoveHandlerOnCheckBoxChange.AOnCheckBoxChange">
<short>
Handler routine removed in the method.
</short>
</element>

<element name="TCustomDateTimePicker.EffectiveHideDateTimeParts">
<short>
Set with the date/time parts which are effectively hidden on the control.
</short>
<descr>
<p>
<var>EffectiveHideDateTimeParts</var> is a read-only TEffectiveDateTimeParts 
property which contains the date/time parts which are effectively hidden for 
the control. Values are included in the set to indicate that specific date/
time parts are not visible for the configuration settings in the control, or 
explicitly hidden using the HideDateTimeParts property.
</p>
<p>
Properties which affect date/time part visibility include:
</p>
<ul>
<li>Kind</li>
<li>TimeDisplay</li>
<li>TimeFormat</li>
<li>HideDateTimeParts</li>
</ul>
<p>
The TDateTimePart values in EffectiveHideDateTimeParts are determined when a 
new value is assigned to one of these properties.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Kind"/>
<link id="TCustomDateTimePicker.TimeDisplay"/>
<link id="TCustomDateTimePicker.TimeFormat"/>
<link id="TCustomDateTimePicker.HideDateTimeParts"/>
<link id="TEffectiveDateTimeParts"/>
<link id="TDateTimePart"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.EffectiveDateDisplayOrder">
<short>
Indicates the effective display order for the date parts on the control.
</short>
<descr>
<p>
<var>EffectiveDateDisplayOrder</var> is a read-only TDateDisplayOrder property 
which contains the effective order for the date parts displayed on the 
control. It reflects the order for the date found parts found when 
DateDisplayOrder contains ddoTryDefault.
</p>
<p>
The value for the property is assigned when the value in the DateDisplayOrder 
property is changed. It indicates the order for the date parts found in the  
date formats from DefaultFormatSettings. The tokens in the short date format 
are examined to determine the order for the date parts. If an order cannot be 
determined using the short date format, the long date format in 
DefaultFormatSettings is checked. If an order cannot be determined using 
either format value, the order indicated by ddoYMD is used.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DateDisplayOrder"/>
<link id="TDateDisplayOrder"/>
<link id="#rtl.sysutils.DefaultFormatSettings">SysUtils.DefaultFormatSettings</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.BorderStyle">
<short>
Border style drawn around the control.
</short>
<descr>
<p>
BorderStyle is a TBorderStyle property redeclared in TCustomDateTimePicker to 
use bsSingle as the default value. Use bsNone to omit a border on the edges of 
the control.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TCustomControl.BorderStyle">TCustomControl.BorderStyle</link>
<link id="#lcl.controls.TBorderStyle">TBorderStyle</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.AutoSize">
<short>
Allows the control to be automatically resized to the content displayed on the 
control.
</short>
<descr>
<p>
AutoSize is redeclared in TCustomDateTimePicker to use <b>True</b> as the 
default value for the property. Changing the value to <b>True</b> causes 
InvalidatePreferredSize to be called prior to storing the new value for the 
property.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TControl.AutoSize">TControl.AutoSize</link>
<link id="#lcl.controls.TControl.InvalidatePreferredSize">TControl.InvalidatePreferredSize</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.TabStop">
<short>
Allows the user to navigate to / from the control by pressing the Tab or 
Shift+Tab keys. 
</short>
<descr>
<p>
Redeclared in <var>TCustomDateTimePicker</var> to use <b>True</b> as the 
default value for the property.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.ParentColor">
<short>
Indicates the Color from the Parent control is used when enabled.
</short>
<descr>
<p>
<var>ParentColor</var> determines if the control should use the Color from the 
Parent control when enabled. ParentColor is redeclared in 
TCustomDateTimePicker to use False as the default value for the property.
</p>
</descr>
<seealso>
<link id="#lcl.controls.TControl.ParentColor">TControl.ParentColor</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.CenturyFrom">
<short>
Contains the threshold for the century used in two-digit year values.
</short>
<descr>
<p>
<var>CenturyFrom</var> is a <var>Word</var> property with the year number used 
as the threshold for the century used in a year entered in two-digit format. 
The default value for the property is 1941, and causes two-digit year values 
to fall in the range 1941-2040. 
</p>
<p>
Please note that MinDate and MaxDate properties can also have an influence on 
the value. For example, if the CenturyFrom is set to 1941 and MaxDate to 
31-Dec-2010, entering 23 as a year value causes 1923 to be used because it 
cannot be 2023 due to MaxDate limit.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.MinDate"/>
<link id="TCustomDateTimePicker.MaxDate"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DateDisplayOrder">
<short>
Defines the display order for the year, month, and day parts of the date.
</short>
<descr>
<p>
<var>DateDisplayOrder</var> is a TDateDisplayOrder property. The enumeration 
value assigned to the property determines the order of the date parts 
displayed on the control.
</p>
<dl>
<dt>doDMY</dt>
<dd>Displays the date in Day, Month, and Year order.</dd>
<dt>ddoMDY</dt>
<dd>Displays the date in Month, Day, and Year order.</dd>
<dt>ddoYMD</dt>
<dd>Displays the date in Year, Month, and Day order.</dd>
<dt>ddoTryDefault</dt>
<dd>
When ddoTryDefault is set, the control tries to determine the order from the 
ShortDateFormat global variable.
</dd>
</dl>
<p>
It is similar to the DateOrder property in TDateEdit.
</p>
<p>
Use DateSeparator to specify the delimiter displayed between the date parts.
</p>
<p>
Use TimeSeparator and DecimalSeparator to specify the delimiters displayed 
between time parts on the control.
</p>
<p>
Set UseDefaultSeparators to True to use the locale-specific date and time 
separators found in the run-time FormatSettings.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.MaxDate">
<short>
User-specified upper limit for date values that can be entered or selected 
using the control.
</short>
<descr>
<p>
<var>MaxDate</var> is a TDate property which indicates the largest date value 
that can be entered or selected using the control. Changing the value for the 
property causes the new value to validated and normalized.
</p>
<p>
MaxDate must contain a value which is valid for the TDateTime type, and within 
the range limits used for the drop-down calendar control in the class 
instance. The value in TheBiggestDate (31-Dec-9999) is used as the upper limit 
for the property value.
</p>
<p>
If the current value in DateTime is larger than the new property value, 
MaxDate is stored to the DateTime property.
</p>
<p>
Use MinDate to set the lower limit for the Date value in the control.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Date"/>
<link id="TCustomDateTimePicker.DateTime"/>
<link id="TCustomDateTimePicker.MinDate"/>
<link id="TCustomDateTimePicker.UpdateDate"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.MinDate">
<short>
User-specified lower limit for date values that can be entered or selected 
using the control.
</short>
<descr/>
<seealso/>
</element>

<element name="TCustomDateTimePicker.DateTime">
<short>
Contains the TDateTime value for the control.
</short>
<descr>
<p>
<var>DateTime</var> is a <var>TDateTime</var> property with the value 
displayed and edited on the control. By default, the property is set to the 
value from SysUtils.Now in the constructor for the class instance.
</p>
<p>
DateTime is not a published property and does not appear in the object 
inspector at design-time. It can be accessed at run-time in program code. Its 
component values are accessible using the Date and Time properties for the 
control, which can be set in the object inspector using their design-time 
property editors.
</p>
<p>
DateTime is provided to allow reading or writing both the date and the time 
values at once in program code. The property contains the NullDate value when 
DateIsNull returns <b>True</b>. Changing the value for the property causes the 
UpdateDate method to be called to range limit, validate, and store the new 
value.
</p>
<p>
Use MinDate and MaxDate to define the range of dates allowed in the control. 
If they are not assigned, the values in TheSmallestDate and TheBiggestDate are 
used.
</p>
<remark>
TCalendar does not accept smaller dates then 14-Sep-1752 on the Windows OS 
(see the implementation of TCustomCalendar.SetDateTime). The Delphi help 
documents that the Windows control behaves strangely when using dates prior to 
24-Sep-1752. Actually, the TCalendar control has problems displaying       
dates before 1-Oct-1752. In the LCL, uniform behavior is achieved by using 
1-Oct-1752 as the lower limit for the type.
</remark>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Date"/>
<link id="TCustomDateTimePicker.Time"/>
<link id="TCustomDateTimePicker.MaxDate"/>
<link id="TCustomDateTimePicker.MinDate"/>
<link id="TCustomDateTimePicker.UpdateDate"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.TrailingSeparator">
<short>
Causes a trailing date separator to be displayed for the date value when 
enabled.
</short>
<descr>
<p>
When set to <b>True</b>, the DateSeparator is displayed after the last date 
part in the display order. This property exists because in some languages the 
correct date format is 31. 1. 2010. including the last delimiter after the 
year value.
</p>
<p>
The default value for the property is <b>False</b> as assigned in the 
constructor for the class instance.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DateSeparator"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.ReadOnly">
<short>
Indicates the value in the control cannot be changed when set to <b>True</b>.
</short>
<descr>
<p>
<var>ReadOnly</var> is a <var>Boolean</var> property which indicates whether 
the Date/Time value  can be changed using the control. The default value for 
the property is <b>False</b>.
</p>
<p>
Changing the value for the property causes user-specified values in text 
parts to be validated and applied before the property value is changed.
</p>
<p>
ReadOnly is used in methods which respond to mouse or key events in the 
control. The methods allow updates to occur only when ReadOnly is set to 
<b>False</b>. When set to <b>True</b>, the drop-down calendar for a date value 
cannot be displayed when the drop-down button is clicked.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.LeadingZeros">
<short>
Determines whether the date/time parts are displayed with or without leading 
zeros.
</short>
<descr>
<p>
<var>LeadingZeros</var> is a Boolean property which determines whether leading 
zero ('0') characters are displayed for the numeric values in the date/time 
parts.
</p>
<p>
When LeadingZeros is set to <b>True</b>, numeric values are padded to the left 
with '0' characters until the maximum precision for a month, day, or hour 
date/time part is reached. When set to <b>False</b>, the Space character (
' ' #32) is used to left-pad the numeric values.
</p>
<p>
LeadingZeros does not apply to one- or two-digit year values where CenturyFrom 
is used to fill the date part. It also does not apply to minute, second, or 
millisecond time parts where zero padding is always used. 
</p>
<p>
Changing the value for the property causes the UpdateDate method to be called 
to validate and range limit the value in DateTime, and to signal the assigned 
OnChange event handlers for the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.TextForNullDate">
<short>
Text displayed when the DateTime value is a null date and the control does not 
have focus.
</short>
<descr>
<p>
The default value for the property is 'NULL' as assigned in the constructor 
for the class instance.
</p>
<p>
When the control is focused, the text changes to its defined format but 
displays zeros or nines where appropriate. The user can set the date to the 
value in the NullDate constant by pressing the 'N' key when the 
NullInputAllowed property is <b>True</b>.
</p>
<p>
When TextForNullDate is set to empty string, zeros ('0') and nines ('9') are 
displayed even when control does not have focus. Zeros are used in the date 
value. Nines are used in the time value. To display an empty value, set 
TextForNullDate to a string with one or more space (' ' decimal #32) 
characters.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.NullInputAllowed">
<short>
When <b>True</b>, the user can set the Date and DateTime values to the 
NullDate constant by pressing the 'N' key.
</short>
<descr/>
<seealso>
<link id="NullDate"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.OnChange">
<short>
Event handler signalled when the DateTime value for the control has been 
changed.
</short>
<descr>
<p>
<var>OnChange</var> is a <var>TNotifyEvent</var> property with the event 
handler signalled when the DateTime value is changed on the control. OnChange 
is signalled (when assigned) from the Change method. It normally occurs when 
the user interacts with the control - by assigning values directly to text 
parts or using the keys and buttons provided for the control.
</p>
<p>
Include the value dtpoDoChangeOnSetDateTime in the Options property to signal 
the OnChange event handler when a value is assigned to DateTime in program 
code.
</p>
<p>
Use the AddHandlerOnChange and Remove HandlerOnChange methods to assign 
additional OnChange handler routines for the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.OnCheckBoxChange">
<short>
Event handler signalled when the Checked state for a check box on the control has been changed.
</short>
<descr/>
<seealso/>
</element>

<element name="TCustomDateTimePicker.OnDropDown">
<short>
Event handler signalled when the drop-down calendar dialog for the control has 
been displayed.
</short>
<descr/>
<seealso/>
</element>

<element name="TCustomDateTimePicker.OnCloseUp">
<short>
Event handler signalled when the drop-down calendar dialog has been closed.
</short>
<descr/>
<seealso/>
</element>

<element name="TCustomDateTimePicker.ShowCheckBox">
<short>
Displays a check box on the control when enabled.
</short>
<descr>
<p>
ShowCheckBox is a Boolean property which displays a check box on the control 
when enabled. 
</p>
<p>
When set to <b>True</b>, a check box is displayed on the control. By default, 
when unchecked, the display appears "grayed" and user interaction with the 
date/time parts is not possible. The control is still enabled, though, only in 
the sense that the check box remains enabled. This behavior may be changed if 
dtpoEnabledIfUnchecked is included in the Options property; this allows 
editing when the check box is not checked, and the programmer can decide how 
it will be used in the OnCheckBoxChange event.
</p>
<p>
When set to <b>False</b>, the check box is not displayed on the control.
</p>
<p>
The value in the BiDiMode property is used to determine the placement for the 
check box. When BiDiMode is set to bdLeftToRight, the check box is drawn on 
the left-hand edge of the control before the Date, Time or DateTime value. Any 
other value in BiDiMode causes the check box to be drawn on the right-hand 
edge of the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.Checked">
<short>
Indicates whether the check box for the control is in the checked state.
</short>
<descr>
<p>
If ShowCheckBox is set to <b>False</b>, the property value is automatically 
set to <b>True</b> but is not used in the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.ArrowShape">
<short>
Indicates the shape drawn for the drop-down arrow on the control.
</short>
<descr>
<p>
<var>ArrowShape</var> is a <var>TArrowShape</var> property which indicates the 
shape drawn as the glyph for the drop-down button on the control. The default 
value for the property is <var>asTheme</var>, and causes the element detail 
from ThemeServices to be used to draw the shape.
</p>
<p>
See <link id="TArrowShape">TArrowShape</link> for more information about the 
values for the property and their meanings.
</p>
<p>
Changing the value for the property causes the button on the control to be 
redrawn by calling its Invalidate method.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Paint"/>
<link id="TArrowShape"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.Kind">
<short>
Controls whether a date, time, or both can be edited using the control.
</short>
<descr>
<p>
<var>Kind</var> is a <var>TDateTimeKind</var> property which controls the 
value displayed for the date time picker control. The default value for the 
property is dtkDate as assigned in the constructor for the class instance, and 
causes the Date value to be displayed and edited using the control.
</p>
<p>
Use dtkTime to display and edit the Time value. Use dtkDateTime to display and 
edit both the Date and Time values.
</p>
<p>
Use properties like DateDisplayOrder, TimeDisplay, and TimeFormat to control 
the order and formatting for the values displayed on the control.
</p>
<p>
Use DateMode to control the button(s) displayed for the control.
</p>
<p>
Use HideDateTimeParts to hide date/time parts which are normally displayed for 
the property settings in the control.
</p>
</descr>
<seealso>
<link id="TDateTimeKind"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DateSeparator">
<short>
Separator used between the values in the Date for the control.
</short>
<descr>
<p>
<var>DateSeparator</var> is a <var>String</var> property which defines the 
values used to separate the date, month and year parts for a Date value. The 
default value is assigned in the constructor, and uses the value in 
DefaultFormatSettings.DateSeparator.
</p>
<p>
Setting this property automatically sets the UseDefaultSeparators property to 
<b>False</b>. To ensure that date and time separators are set to the 
locale-specific system defaults, set the UseDefaultSeparators property to 
<b>True</b>.
</p>
<p>
Use TimeSeparator to specify the delimiter between the parts in the Time value.
</p>
<p>
Use DecimalSeparator to specify the notation used for the decimal point in a 
milliseconds value.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.TimeSeparator">
<short>
Separator used between the hours, minutes, and seconds in the Time for the 
control.
</short>
<descr>
<p>
Defines the string used to separate hour, minute, second time parts on the control. Setting this property automatically sets the UseDefaultSeparators 
property to <b>False</b>. To ensure that date and time separators are set to 
the locale-specific system defaults, set UseDefaultSeparators property to 
<b>True</b>.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.DecimalSeparator">
<short>
Notation used for the decimal point displayed prior to a millisecond value.
</short>
<descr>
<p>
<var>DecimalSeparator</var> is a String property which contains the 
character(s) displayed as the decimal point for a milliseconds value in Time. 
The default value for the property is the locale-specific default 
FormatSettings.DecimalSeparator as assigned in the constructor for the class 
instance. Changing the value for the property causes the sizes for the text 
parts on the control to be recalculated, and the control is redrawn.
</p>
<p>
DecimalSeparator is used in the Paint method when the text for date or 
date/time parts and their separators are drawn on the control. It is not used 
when Kind is set dktDate to display a Date value.
</p>
<p>
Use DateSeparator to set the character(s) displayed between the text parts in 
a Date value.
</p>
<p>
Use TimeSeparator to set the character(s) displayed between the text parts in 
a Time value - excluding milliseconds.
</p>
<p>
Set the UseDefaultSeparators property to <b>True</b> to restore the values in 
DefaultFormatSettings to the DateSeparator, TimeSeparator, and 
DecimalSeparator properties.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.UseDefaultSeparators">
<short>
Restores the default settings for the DateSeparator, TimeSeparator, and 
DecimalSeparator properties.
</short>
<descr>
<p>
When this property is set to <b>True</b>, the values from 
DefaultFormatSettings are stored in the DateSeparator, TimeSeparator, and 
DecimalSeparator properties. Changing the value from <b>True</b> to 
<b>False</b> does not change the associated separators.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DateSeparator"/>
<link id="TCustomDateTimePicker.TimeSeparator"/>
<link id="TCustomDateTimePicker.DecimalSeparator"/>
<link id="#rtl.sysutils.DefaultFormatSettings">DefaultFormatSettings</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.TimeFormat">
<short>
Indicates whether a Time value uses a 12-hour or 24-hour clock.
</short>
<descr>
<p>
TimeFormat is a TTimeFormat property which controls format used to display a 
Time value on the control. When TimeFormat contains tf12, a 12-hour clock is 
used to display the Time value and an AM/PM indicator is displayed. When set 
to tf24, a 24-hour clock is used for the Time value and the AM/PM indicator is 
hidden.
</p>
<p>
Changing the value for the property causes the visibility for the date/time 
parts to be recalculated. Date/time parts in the HideDateTimeParts property 
are hidden (when visible) on the control.
</p>
<p>
Use TimeDisplay to control the time parts displayed for a Time value. Seconds 
and milliseconds are optional. 
</p>
<p>
Use HideDateTimeParts to hide any date/time part which would otherwise be 
visible for the settings in Kind, DateDisplayOrder, TimeDisplay and TimeFormat 
properties.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.TimeDisplay">
<short>
Indicates the time parts displayed and edited in the Time value.
</short>
<descr>
<p>
<var>TimeDisplay</var> is a TTimeDisplay property which indicates the time 
parts in displayed and edited on the control. Values for the property include:
</p>
<dl>
<dt>tdHM</dt>
<dd>
Displays the Hour and Minute parts of the Time value.
</dd>
<dt>tdHMS</dt>
<dd>
Displays the Hour, Minute, and Second parts of the Time value.
</dd>
<dt>tdHMSMs</dt>
<dd>
Displays the Hour, Minute, Second, and Millisecond parts of the Time value.
</dd>
</dl>
<p>
The default value for the property is tdHMS as assigned in the constructor for 
the class. Changing the value for the property causes the effective visibility 
of the date/time parts to be recalculated, and the control is redrawn.
</p>
<p>
TimeDisplay is used when Kind is set to dtkTime or dtkDateTime to make the 
Time value visible on the control. The visible date/time parts are drawn in 
the Paint method.
</p>
<p>
Use TimeFormat to specify whether the hour is displayed using a 
24-hour clock or a 12-hour clock with AM/PM notation.
</p>
<p>
Use HideDateTimeParts to suppress display of a date/time part which is 
normally visible for the property settings in the control.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Time"/>
<link id="TCustomDateTimePicker.TimeFormat"/>
<link id="TCustomDateTimePicker.HideDateTimeParts"/>
<link id="TCustomDateTimePicker.EffectiveHideDateTimeParts"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.Time">
<short>
The Time value displayed and edited using the control.
</short>
<descr>
<p>
<var>Time</var> is a TTime property which contains the time value displayed 
and edited on the control. The value in Time is read from and written to the 
DateTime property for the control. It contains the fractional portion of the 
DateTime value. Time can contains the value from the NullDate constant if 
DateTime does not have a valid value for the TDateTime type (IsNullDate).
</p>
<p>
The OnChange event handler is signalled (when assigned) if the value in Time 
is modified using the keyboard, the mouse, or cursor keys. It is not signalled 
when a value is assigned to the DateTime property in program code unless the 
value dtpoDoChangeOnSetDateTime has been included in the Options property.
</p>
<p>
Set Kind to dtkTime or dtkDateTime to display and edit the value in the Time  
property.
</p>
<p>
Use TimeDisplay to specify the time parts which are visible on the control.
</p>
<p>
Use TimeFormat to specify whether the hour value in Time uses a 24-hour clock 
or a 12-hour clock with AM/PM notation.
</p>
<p>
Use HideDateTimeParts to hide any date part which is normally visible for the 
settings in the properties.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DateTime"/>
<link id="TCustomDateTimePicker.TimeDisplay"/>
<link id="TCustomDateTimePicker.TimeFormat"/>
<link id="TCustomDateTimePicker.HideDateTimeParts"/>
<link id="TCustomDateTimePicker.EffectiveHideDateTimeParts"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.Date">
<short>
The Date value displayed and edited using the control.
</short>
<descr>
<p>
<var>Date</var> is a TDate property which contains the date value displayed 
and edited on the control. The value in Date is read from and written to the 
DateTime property in the control. It contains the Integer portion of the value 
in DateTime. Date can contain the value from the NullDate constant if DateTime 
does not have a valid value for the TDateTime type (IsNullDate).
</p>
<p>
The OnChange event handler is signalled (when assigned) if the value in Date 
is modified using the keyboard, the mouse, cursor keys, or the drop-down 
calendar for the control. It is not signalled when a value is assigned to the 
property in program code unless the value dtpoDoChangeOnSetDateTime has been 
included in the Options property.
</p>
<p>
Set Kind to dtkDate or dtkDateTime to display and edit the value in the Date 
property.
</p>
<p>
Use DateDisplayOrder to control the order of the parts displayed for the Date 
value.
</p>
<p>
Use HideDateTimeParts to hide any date part which is normally visible for the 
settings in the properties.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DateTime"/>
<link id="TCustomDateTimePicker.Kind"/>
<link id="TCustomDateTimePicker.DateDisplayOrder"/>
<link id="TCustomDateTimePicker.HideDateTimeParts"/>
<link id="TCustomDateTimePicker.Time"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DateMode">
<short>
Indicates the button style used to display the drop-down calendar for a Date 
value on the control.
</short>
<descr>
<p>
When DateMode is set to dmComboBox, there is a drop-down button displayed for 
the control - like on a combo-box. When the user clicks the button, the 
calendar control is displayed and allows the user to pick the date. When set 
to dmUpDown, a TUpDown button control is displayed to increment or decrement 
the value in the selected date/time part.
</p>
<p>
The button is displayed on the right-hand edge of the control when BiDiMode is 
set to bdLeftToRight. If BiDiMode is set to any other value, the button is 
displayed on the left-hand edge of the control.
</p>
<p>
Use the ArrowShape property to specify the shape used for the glyph on the 
drop-down button.
</p>
<p>
In my opinion the UpDown buttons aren't really useful in this control, they 
are provided for compatibility with Delphi's TDateTimePicker. Up and down keys 
can always serve for same purpose, so can mouse wheel.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Kind"/>
<link id="TCustomDateTimePicker.ArrowShape"/>
<link id="TCustomDateTimePicker.SetBiDiMode"/>
<link id="#lcl.controls.TControl.BiDiMode">TControl.BiDiMode</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.Cascade">
<short>
Enables updates to affected date/time parts when the value for a date/time 
part is cycled beyond its upper or lower limits.
</short>
<descr>
<p>
<var>Cascade</var> is a <var>Boolean</var> property which indicates if a 
change to the value for a date/time part (like Day number) can increase or 
decrease the value in another date/time part (like Month or Year number).
</p>
<p>
For example, consider the date 1-Jan-2023 where the user decreases the Day 
number using the Down button or the cursor Down key.
</p>
<p>
If Cascade is enabled, the Day number is changed to 31 and both the Month and 
Year numbers are changed to reflect the roll-over condition. Month is changed 
to the previous month, and Year is changed reflect that the month is in the 
previous year. The change is cascaded to the affected date/time parts, and the 
resulting date is 31-Dec-2022.
</p>
<p>
If Cascade is set to <b>False</b>, the Day number is changed to 31 for the 
roll-over condition but the Year and Month values are unaffected. The 
resulting date is 31-Jan-2023.
</p>
<p>
The default value for the property is <b>False</b>, and causes the value in a  
date/time part to be cycled without affecting another date/time part. When 
enabled, it applies to all of the date/time part values.
</p>
<remark>
Please note that Cascade does not apply to changes to the AM/PM indicator in a 
time value using a 12-hour clock (TimeFormat = tf12). A change to AM/PM always 
updates the hour value as needed regardless of the setting in Cascade.
</remark>
<p>
Cascade is used in methods which increment or decrement values for date/time 
parts, like: IncreaseMonth, DecreaseMonth, IncreaseHour, DecreaseHour, et. al.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.AutoButtonSize">
<short>
Enables automatic resizing of the button width proportionate to the height 
for the control.
</short>
<descr>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.AutoAdvance">
<short>
Allows the text selection to automatically advance to the next date/time part 
when the current selection is filled with a valid value for the part.
</short>
<descr/>
<seealso/>
</element>

<element name="TCustomDateTimePicker.HideDateTimeParts">
<short>
Contains the user-specified set of date/time parts which are hidden on the 
control.
</short>
<descr>
<p>
<var>HideDateTimeParts</var> is a <var>TDateTimeParts</var> property with the 
user-specified date/time parts which are hidden on the control. It can contain 
0 (zero) or more values from the TDateTimeHidePart enumeration. Values in the 
set type can be assigned at design-time using a property editor in the Object 
Inspector, or at run-time using Include() or Exclude().
</p>
<p>
In most cases, use of HideDateTimeParts is not needed; properties like Kind 
and TimeDisplay can be used to control the hidden date/time parts. However, if 
more control is needed, the property can be used to hide any date/time part 
which would normally be visible for the property settings. It cannot be used 
to display a date/time part which is otherwise hidden for the property 
settings.
</p>
<p>
Please note that the AM/PM indicator cannot be added to the property; its 
visibility is controlled by the setting in TimeFormat.
</p>
<p>
HideDateTimeParts is combined with the effective date/time parts for the 
property settings at run-time, and stored in the EffectiveHideDateTimeParts 
property.
</p>
<p>
Some example use cases and their property settings include:
</p>
<p>
For a partial Date displayed as Jan 2023.
</p>
<code>
Kind := dtkDate;
DateDisplayOrder := ddoMDY;
MonthDisplay := mdShort;
ShowMonthNames := True;
HideDateTimeParts := [dtpDay];
</code>
<p>
For a partial Date displayed as January 31.
</p>
<code>
Kind := dtkDate;
DateDisplayOrder := ddoMDY;
MonthDisplay := mdLong;
ShowMonthNames := True;
HideDateTimeParts := [dtpYear];
</code>
<p>
For a time displayed as minutes, seconds, and milliseconds (like a 
short-duration elapsed time).
</p>
<code>
Kind := dtkTime;
TimeDisplay := tdHMSMs;
TimeFormat := tf24;
HideDateTimeParts := [dtpHour];
</code>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.CalendarWrapperClass">
<short>
Contains the calendar control class used on the drop-down calendar dialog.
</short>
<descr>
<p>
When assigned, this property determines the type of the calendar control used 
on the drop-down calendar dialog. When set to <b>Nil</b>, which is the 
default, the value of the global variable DefaultCalendarWrapperClass is used. 
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.MonthDisplay">
<short>
Indicates the display format / length for month names on the control.
</short>
<descr>
<p>
<var>MonthDisplay</var> is a TMonthDisplay property which indicates the format 
or length for month names displayed on the control when ShowMonthNames is 
enabled. Values for the property include:
</p>
<dl>
<dt>mdShort</dt>
<dd>
Displays the short variant of month names for the month in the Date value. The 
month names contain the values from DefaultFormatSettings.ShortMonthNames.
</dd>
<dt>mdLong</dt>
<dd>
Displays the long variant of month names for the month in the Date value. The 
month names contain the values from DefaultFormatSettings.LongMonthNames.
</dd>
<dt>mdCustom</dt>
<dd>
Displays values from CustomMonthNames for the month in the Date value. An 
empty value in CustomMonthNames defaults to the value used when the property 
is set to mdLong.
</dd>
</dl>
<p>
The default value for the property is mdLong. Changing the value for the 
property causes the internal array for month names to be reloaded. If 
ShowMonthNames is enabled, the sizes needed for the date/time parts is 
recalculated and UpdateDte is called to force the control to be redrawn.
</p>
<p>
Set Kind to dtkDate or dtkDateTime to enabled display of the Date value on the 
control.
</p>
<p>
Use DateDisplayOrder to control order of the date parts displayed on the 
control.
</p>
<p>
Use HideDateTimeParts to hide a date/time part which is normally visible for 
the property settings in the control.
</p>
<remark>
MonthDisplay is provided an alternative to use of the MonthNames property. In 
prior LCL versions, MonthNames needed access to the ShortMonthNames and 
LongMonthNames variables in the FPC RTL. These values have been deprecated in 
the RTL, and MonthNames now uses the values in DefaultFormatSettings.
</remark>
</descr>
<seealso>
<link id="TCustomDateTimePicker.ShowMonthNames"/>
<link id="TCustomDateTimePicker.CustomMonthNames"/>
<link id="TCustomDateTimePicker.MonthNames"/>
<link id="TCustomDateTimePicker.Kind"/>
<link id="TCustomDateTimePicker.Date"/>
<link id="TCustomDateTimePicker.DateTime"/>
<link id="TCustomDateTimePicker.DateDisplayOrder"/>
<link id="TCustomDateTimePicker.DateSeparator"/>
<link id="TCustomDateTimePicker.HideDateTimeParts"/>
<link id="#rtl.sysutils.DefaultFormatSettings">DefaultFormatSettings</link>
</seealso>
</element>

<element name="TCustomDateTimePicker.MonthNames">
<short>
Controls the month names displayed when ShowMonthNames is set to <b>True</b>.
</short>
<descr>
<p>
When ShowMonthNames is set to <b>True</b>, this property determines which 
month names should appear. If MonthNames is set to 'Short' or 'Long', then 
month names are set to ShortMonthNames or LongMonthNames respectively.
</p>
<p>
To set the month names explicitly, this property should be set to string which 
starts with a character which will be used to separate months and then twelve 
names separated by this character. For example: 
',I,II,III,IV,V,VI,VII,VIII,IX,X,XI,XII' — roman numbers are used for months — 
the first character is comma, which means that comma is used to separate the 
months.
</p>
<p>
Another example: ';jan;feb;mar;apr;maj;jun;jul;avg;sep;okt;nov;dec'.
So, the separator should be the first character, before the first month name, 
and then only if there are twelve month names separated by that separator, the 
format is valid.
</p>
<p>
The default value of this property is 'Long'.
</p>
<p>
Set Kind to dtkDate or dtkDateTime to enabled display of the Date value on the 
control.
</p>
<p>
Use DateDisplayOrder to control order of the date parts displayed on the 
control.
</p>
<p>
Use HideDateTimeParts to hide a date/time part which is normally visible for 
the property settings in the control.
</p>
<remark>
Use of MonthNames is now largely redundant. The same functionality is 
available using MonthDisplay and CustomMonthNames. In prior LCL versions, 
MonthNames needed access to the ShortMonthNames and LongMonthNames variables 
in the FPC RTL. These values have been deprecated in the RTL, and MonthNames 
now uses the values in DefaultFormatSettings.
</remark>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.CustomMonthNames">
<short>
List of user-specified Month names displayed when MonthDisplay is set to 
mdCustom.
</short>
<descr>
<p>
<var>CustomMonthNames</var> is a TStrings property with a list of custom month 
names displayed on the control. It is used when ShowMonthNames is set to <b>
True</b> and MonthDisplay is set to mdCustom. It should contain 12 lines with 
the name for the corresponding month in the text.
</p>
<p>
Assign the values in the property prior to setting MonthDisplay to mdCustom. 
Any missing or empty line in CustomMonthNames is replaced with the value from 
DefaultFormatSettings.LongMonthNames when MonthDisplay is changed to mdCustom.
</p>
<p>
Set Kind to dtkDate or dtkDateTime to display a Date value on the control.
</p>
<p>
Use DateDisplayOrder to specify the display order for the date parts on the 
control.
</p>
<p>
Set ShowMonthNames to <b>True</b> to display month names instead of month 
numbers on the control.
</p>
<p>
Set MonthDisplay to mdCustom to enable use of the values in CustomMonthNames.
</p>
<remark>
CustomMonthNames and MonthDisplay are provided an alternative to use of the 
MonthNames property. In prior LCL versions, MonthNames needed access to the 
ShortMonthNames and LongMonthNames variables in the FPC RTL. These values have 
been deprecated in the RTL, and MonthNames now uses the values in 
DefaultFormatSettings.
</remark>
</descr>
<seealso>
<link id="TCustomDateTimePicker.MonthDisplay"/>
<link id="TCustomDateTimePicker.MonthNames"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.ShowMonthNames">
<short>
Displays month names instead of month numbers when enabled.
</short>
<descr>
<p>
<var>ShowMonthNames</var> is a Boolean property which causes month names to be 
displayed instead of month numbers when set to <b>True</b>. When set to 
<b>False</b>, month numbers are displayed in the date part.
</p>
<p>
Use CustomMonthNames to specify a list of user-specified values used as the 
names for the months.
</p>
<p>
Use MonthDisplay to specify the format, length, and origin of the month names 
displayed on the control.
</p>
<p>
Use DateDisplayOrder to specify the display order for the date parts on the 
control.
</p>
<p>
Set Kind to dtkDate or dtkDateTime to display a Date value on the control.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.MonthDisplay"/>
<link id="TCustomDateTimePicker.MonthNames"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DroppedDown">
<short>
Indicates whether the drop-down calendar dialog is visible for the control.
</short>
<descr>
<p>
<var>DroppedDown</var> is a read-only Boolean property which indicates whether 
the drop-down button for the control has been clicked and the calendar control 
is visible. The property value is <b>True</b> when the internal calendar form 
has been assigned for the control in the DropDownCalendarForm method.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.DropDownCalendarForm"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.CalAlignment">
<short>
Alignment for the drop-down calendar dialog relative to the bounds for the 
control.
</short>
<descr/>
<seealso/>
</element>

<element name="TCustomDateTimePicker.Alignment">
<short>
Alignment for the text displayed for the visible date/time parts on the 
control.
</short>
<descr>
<p>
<var>Alignment</var> is redeclared in TCustomDateTimePicker. It has an 
overridden write specifier which ensures that the control is invalidated and 
redrawn when the property value has been changed. The default value for the 
property is taLeftJustify, and causes the text for the date/time parts to be 
left-aligned within the control bounds.
</p>
<p>
The value in Alignment does not affect the placement of the button on the 
control; use BiDiMode to specify where the button is drawn.
</p>
<p>
Use CalAlignment to specify the alignment of the drop-down calendar dialog 
relative the bounds for the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.Options">
<short>
Set type with the optional features or behaviors enabled for the control.
</short>
<descr>
<dl>
<dt>dtpoDoChangeOnSetDateTime</dt>
<dd>
The OnChange handler will be called also when DateTime is programmatically 
changed.
</dd>
<dt>dtpoEnabledIfUnchecked</dt>
<dd>
Enable the date time picker if the check box is unchecked.
</dd>
<dt>dtpoAutoCheck</dt>
<dd>
Auto-check an unchecked check box when DateTime is changed (makes sense only 
if dtpoEnabledIfUnchecked is set).
</dd>
<dt>dtpoFlatButton</dt>
<dd>
Use flat button for calendar picker.
</dd>
<dt>dtpoResetSelection</dt>
<dd>
When the control receives focus, the selection is always in the first part 
(the control does not remember which part was selected).
</dd>
</dl>
</descr>
<seealso>
<link id="TDateTimePickerOptions"/>
<link id="TDateTimePickerOption"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.CalendarForm">
<short>
Form instance where the date/time picker control is displayed.
</short>
<descr>
<p>
<var>CalendarForm</var> is a read-only <var>TCustomForm</var> property which 
contains the form instance where the embedded calendar/time picker for the 
control is displayed. Its value is assigned and the form is displayed in the
<var>DropDownCalendarForm</var> method, and occurs when:
</p>
<ul>
<li>
The control does not already have an assigned form instance in CalendarForm.
</li>
<li>
Checked is set to <b>True</b>, or <var>dtpoEnabledIfUnchecked</var> has been 
enabled in <var>Options</var> property.
</li>
<li>
The control is not configured as <var>ReadOnly</var>.
</li>
</ul>
<p>
This occurs at run-time when the drop-down button for the control is clicked, 
or when Alt+Down is pressed in the edit control. CalendarForm is not assigned 
or displayed at design-time.
</p>
<p>
The value assigned to CalendarForm is freed when the form instance in the 
property is destroyed. It is automatically freed and recreated when the 
drop-down arrow for the control is created.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Checked"/>
<link id="TCustomDateTimePicker.DropDownCalendarForm"/>
<link id="TCustomDateTimePicker.Options"/>
<link id="TCustomDateTimePicker.ReadOnly"/>
<link id="TDateTimePickerOptions"/>
<link id="TDateTimePickerOption"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.Create">
<short>
Constructor for the class instance.
</short>
<descr>
<p>
<var>Create</var> is the overridden constructor for the class instance. It 
calls the inherited constructor on entry to ensure that the Canvas for the 
control is allocated.
</p>
<p>
Create sets the initial bounds for the control to the default size (102x35 
pixels) for the class. It sets the default values for properties in the 
control, which includes:
</p>
<ul>
<li>Kind (dtkDate)</li>
<li>DateDisplayOrder (ddoTryDefault)</li>
<li>DateMode (dmComboBox)</li>
<li>TimeDisplay (tdHMS)</li>
<li>TimeFormat (tf24)</li>
<li>DateSeparator (DefaultFormatSettings.DateSeparator)</li>
<li>TimeSeparator (DefaultFormatSettings.TimeSeparator)</li>
<li>DecimalSeparator (DefaultFormatSettings.DecimalSeparator)</li>
<li>UseDefaultSeparators (True)</li>
<li>LeadingZeros (True)</li>
<li>MonthDisplay (mdLong)</li>
<li>ShowMonthNames (False)</li>
<li>Cascade (False)</li>
<li>AutoButtonSize (False)</li>
<li>AutoAdvance (True)</li>
<li>Options (an empty set)</li>
<li>DateTime (SysUtils.Now)</li>
<li>MinDate (TheSmallestDate)</li>
<li>MaxDate (TheSmallestDate)</li>
<li>CenturyFrom (1941)</li>
<li>
CustomMonthNames (Resources allocated and configured to redraw the control 
when changed).
</li>
</ul>
<p>
Create sets the value for each of the text segments used during editing of the 
date or time parts to an empty string ('').
</p>
<p>
The effective display order and visibility for the date/time parts is 
initially determined in the method.
</p>
</descr>
<seealso/>
</element>
<element name="TCustomDateTimePicker.Create.AOwner">
<short>
Owner of the class instance which receives notification events.
</short>
</element>

<element name="TCustomDateTimePicker.Destroy">
<short>
Destructor for the class instance.
</short>
<descr>
<p>
<var>Destroy</var> is the overridden destructor for the class instance. It 
frees resources allocated in the class instance, including:
</p>
<ul>
<li>The drop-down or up/down button.</li>
<li>OnChange handler(s).</li>
<li>OnCheckBoxChange handler(s).</li>
<li>The TStringList instance for CustomMonthNames.</li>
</ul>
<p>
Destroy calls the inherited method prior to exit to free the class instance.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.Create"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.DateIsNull">
<short>
Returns <b>True</b> if the DateTime property does not contain a valid value 
for the TDateTime type.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.DateTime"/>
<link id="IsNullDate"/>
<link id="#rtl.math.IsNan">IsNan</link>
<link id="#rtl.math.IsInfinite">IsInfinite</link>
<link id="#rtl.sysutils.MaxDateTime">MaxDateTime</link>
<link id="#rtl.sysutils.MinDateTime">MinDateTime</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.DateIsNull.Result">
<short>
Returns <b>True</b> if the DateTime property does not contain a valid 
date/time value.
</short>
</element>

<element name="TCustomDateTimePicker.SelectDate">
<short>
Adjusts the selected text part to ensure it is on one of the values used for a 
Date.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectTime"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SelectTime">
<short>
Adjusts the selected text part to ensure it is on one of the values used for a 
Time.
</short>
<descr/>
<seealso>
<link id="TCustomDateTimePicker.SelectDate"/>
</seealso>
</element>

<element name="TCustomDateTimePicker.SendExternalKey">
<short>
Validates and applies the specified character to the control.
</short>
<descr>
<p>
<var>SendExternalKey</var> handles the following character values in 
<var>AKey</var>:
</p>
<dl>
<dt>'N', 'n'</dt>
<dd>
Applies the value in NullDate to the DateTime value for the control.
</dd>
<dt>'0'..'9'</dt>
<dd>Applied to the value for the selected text part.</dd>
<dt>'A', P'</dt>
<dd>Applied to the AM/PM indicator in a 12-hour time value when selected.</dd>
</dl>
<p>
Values in the LeadingZeros, AutoAdvance, and Options properties are enforced 
after the character value is applied to the control.
</p>
<p>
No actions are performed in the method if the control or its text parts are  
not Enabled, or ReadOnly is set to <b>True</b>.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker.SendExternalKeyCode"/>
</seealso>
</element>
<element name="TCustomDateTimePicker.SendExternalKey.aKey">
<short>
Character value examined and optionally applied to the control.
</short>
</element>

<element name="TCustomDateTimePicker.SendExternalKeyCode">
<short>
Validates and applies the specified virtual key code to the control.
</short>
<descr>
<p>
<var>SendExternalKeyCode</var> handles the following virtual key values in 
<var>Key</var>:
</p>
<dl>
<dt>VK_N ('N')</dt>
<dd>Sets DateTime to the NullDate value.</dd>
<dt>VK_0..VK_9 ('0'..'9')</dt>
<dd>Applied to the value for the selected text part.</dd>
<dt>VK_A ('A'), VK_P ('P')</dt>
<dd>Applied to the AM/PM indicator in a 12-hour time value when selected.</dd>
</dl>
<p>
If the text parts are enabled for the control, the value in Key is converted 
to its character equivalent and SendExternalKey is used to apply the character 
value.
</p>
<p>
If text parts are not enabled, the following value is handled for the control:
</p>
<dl>
<dt>VK_SPACE (#32)</dt>
<dd>Toggles the check box state when ShowCheckBox is set to <b>True</b>.</dd>
</dl>
</descr>
<seealso>
<link id="TCustomDateTimePicker.SendExternalKey"/>
</seealso>
</element>
<element name="TCustomDateTimePicker.SendExternalKeyCode.Key">
<short>
Virtual key code examined and optionally applied to the control.
</short>
</element>

<element name="TCustomDateTimePicker.RemoveAllHandlersOfObject">
<short>
Removes all event handler routines for the specified object.
</short>
<descr/>
<p>
<var>RemoveAllHandlersOfObject</var> is an overridden method in 
TCustomDateTimePicker. It calls the inherited method on entry to remove all 
event handlers attached to the TObject instance in AnObject. It calls the 
RemoveAllMethodsOfObject method in the internal TMethodList instances in the 
control to free the handler types maintained in TCustomDateTimePicker.
</p>
<seealso>
<link id="#lcl.controls.TControl.RemoveAllHandlersOfObject">TControl.RemoveAllHandlersOfObject</link>
<link id="#lcl.controls.TControlHandlerType">TControlHandlerType</link>
<link id="#lazutils.lazmethodlist.TMethodList.RemoveAllMethodsOfObject">TMethodList.RemoveAllMethodsOfObject</link>
</seealso>
</element>
<element name="TCustomDateTimePicker.RemoveAllHandlersOfObject.AnObject">
<short>
Object instance with the event handler routines removed in the method.
</short>
</element>

<element name="TCustomDateTimePicker.Paint">
<short>
Implements the paint handler used to draw the control. 
</short>
<descr>
<p>
<var>Paint</var> is an overridden method in <var>TCustomDateTimePicker</var>. 
It performs actions needed to draw the date and/or time value(s) for the 
control. Paint extends the ancestor method (from TCustomControl) to perform 
drawing for the individual parts (component values) that are enabled and 
visible for the property settings in the control.
</p>
<p>
The values are drawn using methods in the Canvas for the control. This includes:
</p>
<ul>
<li>The background for the control.</li>
<li>
The visible parts for the date / time value including the separators between 
the parts.
</li>
<li>The selected (highlighted) part in the editing control.</li>
<li>
The button(s) which display the calendar dialog, or increment and decrement 
the value for the selected part.
</li>
</ul>
<p>
Paint calls the inherited method (in TCustomControl) prior to exit to signal 
the OnPaint event handler (when assigned).
</p>
<p>
Paint is called from the PaintWindow method, and occurs when a LM_PAINT 
message is handled for the control.
</p>
</descr>
<seealso/>
</element>

<element name="TCustomDateTimePicker.EditingDone">
<short>
Performs actions needed when editing has been completed in the control.
</short>
<descr/>
<seealso/>
</element>

<element name="TDateTimePicker">
<short>
Implements a date/time picker control.
</short>
<descr>
<p>
TDateTimePicker is a TCustomDateTimePicker descendant. It provides a class 
used to enter Date, Time, or DateTime values. It incorporates a button on the 
control to display a drop-down calendar for date values, or up and down 
buttons to increment and decrement the numeric values in a time. Individual 
parts in the date/time values can be changed using the Up and Down cursor 
keys, or by entering the value directly into the control.
</p>
<p>
TDateTimePicker uses locale-specific settings to format and display date/time 
values by default, but allows these settings to be overridden. 
TDateTimePicker ignores the BiDiMode setting when formatting date and time values, but does use the property to align the button(s) on the control.
</p>
<p>
TDateTimePicker sets the visibility for properties, methods, and events 
introduced in ancestor classes. It also marks the MonthNames property as 
deprecated in the class instance.
</p>
</descr>
<seealso>
<link id="TCustomDateTimePicker"/>
<link id="#datetimectrls.dbdatetimepicker.TDBDateTimePicker">TDBDateTimePicker</link>
</seealso>
</element>

<!-- public -->
<element name="TDateTimePicker.AddHandlerOnChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AddHandlerOnChange"/>
<element name="TDateTimePicker.AddHandlerOnChange.AOnChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AddHandlerOnChange.AOnChange"/>
<element name="TDateTimePicker.AddHandlerOnChange.AsFirst" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AddHandlerOnChange.AsFirst"/>

<element name="TDateTimePicker.AddHandlerOnCheckBoxChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AddHandlerOnCheckBoxChange"/>
<element name="TDateTimePicker.AddHandlerOnCheckBoxChange.AOnCheckBoxChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AddHandlerOnCheckBoxChange.AOnCheckBoxChange"/>
<element name="TDateTimePicker.AddHandlerOnCheckBoxChange.AsFirst" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AddHandlerOnCheckBoxChange.AsFirst"/>

<element name="TDateTimePicker.RemoveHandlerOnChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.RemoveHandlerOnChange"/>
<element name="TDateTimePicker.RemoveHandlerOnChange.AOnChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.RemoveHandlerOnChange.AOnChange"/>

<element name="TDateTimePicker.RemoveHandlerOnCheckBoxChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.RemoveHandlerOnCheckBoxChange"/>
<element name="TDateTimePicker.RemoveHandlerOnCheckBoxChange.AOnCheckBoxChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.RemoveHandlerOnCheckBoxChange.AOnCheckBoxChange"/>

<element name="TDateTimePicker.DateTime" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.DateTime"/>
<element name="TDateTimePicker.CalendarWrapperClass" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.CalendarWrapperClass"/>
<element name="TDateTimePicker.DroppedDown" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.DroppedDown"/>

<!-- published -->
<element name="TDateTimePicker.ArrowShape" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.ArrowShape"/>
<element name="TDateTimePicker.ShowCheckBox" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.ShowCheckBox"/>
<element name="TDateTimePicker.Checked" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Checked"/>
<element name="TDateTimePicker.CenturyFrom" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.CenturyFrom"/>
<element name="TDateTimePicker.DateDisplayOrder" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.DateDisplayOrder"/>
<element name="TDateTimePicker.MaxDate" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.MaxDate"/>
<element name="TDateTimePicker.MinDate" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.MinDate"/>
<element name="TDateTimePicker.ReadOnly" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.ReadOnly"/>
<element name="TDateTimePicker.AutoSize" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AutoSize"/>
<element name="TDateTimePicker.Font" link="#lcl.controls.TControl.Font"/>
<element name="TDateTimePicker.ParentFont" link="#lcl.controls.TControl.ParentFont"/>
<element name="TDateTimePicker.TabOrder" link="#lcl.controls.TWinControl.TabOrder"/>
<element name="TDateTimePicker.TabStop" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TabStop"/>
<element name="TDateTimePicker.BorderStyle" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.BorderStyle"/>
<element name="TDateTimePicker.BorderSpacing" link="#lcl.controls.TControl.BorderSpacing"/>
<element name="TDateTimePicker.Enabled" link="#lcl.controls.TControl.Enabled"/>
<element name="TDateTimePicker.Color" link="#lcl.controls.TControl.Color"/>
<element name="TDateTimePicker.ParentColor" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.ParentColor"/>
<element name="TDateTimePicker.DateSeparator" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.DateSeparator"/>
<element name="TDateTimePicker.TrailingSeparator" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TrailingSeparator"/>
<element name="TDateTimePicker.TextForNullDate" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TextForNullDate"/>
<element name="TDateTimePicker.LeadingZeros" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.LeadingZeros"/>
<element name="TDateTimePicker.ShowHint" link="#lcl.controls.TControl.ShowHint"/>
<element name="TDateTimePicker.ParentShowHint" link="#lcl.controls.TControl.ParentShowHint"/>
<element name="TDateTimePicker.Align" link="#lcl.controls.TControl.Align"/>
<element name="TDateTimePicker.Anchors" link="#lcl.controls.TControl.Anchors"/>
<element name="TDateTimePicker.Constraints" link="#lcl.controls.TControl.Constraints"/>
<element name="TDateTimePicker.Cursor" link="#lcl.controls.TControl.Cursor"/>
<element name="TDateTimePicker.PopupMenu" link="#lcl.controls.TControl.PopupMenu"/>
<element name="TDateTimePicker.Visible" link="#lcl.controls.TControl.Visible"/>
<element name="TDateTimePicker.NullInputAllowed" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.NullInputAllowed"/>
<element name="TDateTimePicker.Kind" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Kind"/>
<element name="TDateTimePicker.TimeSeparator" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TimeSeparator"/>
<element name="TDateTimePicker.TimeFormat" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TimeFormat"/>
<element name="TDateTimePicker.TimeDisplay" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TimeDisplay"/>
<element name="TDateTimePicker.DateMode" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.DateMode"/>
<element name="TDateTimePicker.Date" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Date"/>
<element name="TDateTimePicker.Time" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Time"/>
<element name="TDateTimePicker.UseDefaultSeparators" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.UseDefaultSeparators"/>
<element name="TDateTimePicker.Cascade" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Cascade"/>
<element name="TDateTimePicker.AutoButtonSize" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AutoButtonSize"/>
<element name="TDateTimePicker.AutoAdvance" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.AutoAdvance"/>
<element name="TDateTimePicker.HideDateTimeParts" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.TabStop"/>
<element name="TDateTimePicker.BiDiMode" link="#lcl.controls.TControl.BiDiMode"/>
<element name="TDateTimePicker.ParentBiDiMode" link="#lcl.controls.TControl.ParentBiDiMode"/>
<element name="TDateTimePicker.MonthNames" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.MonthNames"/>
<element name="TDateTimePicker.MonthDisplay" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.MonthDisplay"/>
<element name="TDateTimePicker.CustomMonthNames" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.CustomMonthNames"/>
<element name="TDateTimePicker.ShowMonthNames" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.ShowMonthNames"/>
<element name="TDateTimePicker.CalAlignment" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.CalAlignment"/>
<element name="TDateTimePicker.Alignment" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Alignment"/>
<element name="TDateTimePicker.Options" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.Options"/>
<element name="TDateTimePicker.OnChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.OnChange"/>
<element name="TDateTimePicker.OnCheckBoxChange" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.OnCheckBoxChange"/>
<element name="TDateTimePicker.OnDropDown" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.OnDropDown"/>
<element name="TDateTimePicker.OnCloseUp" link="#datetimectrls.datetimepicker.TCustomDateTimePicker.OnCloseUp"/>
<element name="TDateTimePicker.OnChangeBounds" link="#lcl.controls.TControl.OnChangeBounds"/>
<element name="TDateTimePicker.OnClick" link="#lcl.controls.TControl.OnClick"/>
<element name="TDateTimePicker.OnContextPopup" link="#lcl.controls.TControl.OnContextPopup"/>
<element name="TDateTimePicker.OnDblClick" link="#lcl.controls.TControl.OnDoubleClick"/>
<element name="TDateTimePicker.OnEditingDone" link="#lcl.controls.TControl.OnEditingDone"/>
<element name="TDateTimePicker.OnEnter" link="#lcl.controls.TWinControl.OnEnter"/>
<element name="TDateTimePicker.OnExit" link="#lcl.controls.TWinControl.OnExit"/>
<element name="TDateTimePicker.OnKeyDown" link="#lcl.controls.TWinControl.OnKeyDown"/>
<element name="TDateTimePicker.OnKeyPress" link="#lcl.controls.TWinControl.OnKeyPress"/>
<element name="TDateTimePicker.OnKeyUp" link="#lcl.controls.TWinControl.OnKeyUp"/>
<element name="TDateTimePicker.OnMouseDown" link="#lcl.controls.TControl.OnMouseDown"/>
<element name="TDateTimePicker.OnMouseEnter" link="#lcl.controls.TControl.OnMouseEnter"/>
<element name="TDateTimePicker.OnMouseLeave" link="#lcl.controls.TControl.OnMouseLeave"/>
<element name="TDateTimePicker.OnMouseMove" link="#lcl.controls.TControl.OnMouseMove"/>
<element name="TDateTimePicker.OnMouseUp" link="#lcl.controls.TControl.OnMouseUp"/>
<element name="TDateTimePicker.OnMouseWheel" link="#lcl.controls.TControl.OnMouseWheel"/>
<element name="TDateTimePicker.OnMouseWheelDown" link="#lcl.controls.TControl.OnMouseWheelDown"/>
<element name="TDateTimePicker.OnMouseWheelUp" link="#lcl.controls.TControl.OnMouseWheelUp"/>
<element name="TDateTimePicker.OnResize" link="#lcl.controls.TControl.OnResize"/>
<element name="TDateTimePicker.OnShowHint" link="#lcl.controls.TControl.OnShowHint"/>
<element name="TDateTimePicker.OnUTF8KeyPress" link="#lcl.controls.TWinControl.OnUTF8KeyPress"/>

<element name="EqualDateTime">
<short>
Compares the specified TDateTime values to determine if the are equal.
</short>
<descr>
<p>
The return value is <b>True</b> when <var>A</var> and <var>B</var> contain the 
same TDateTime value, or both A and B contain an invalid date/time value.
</p>
</descr>
<seealso>
<link id="IsNullDate"/>
<link id="NullDate"/>
</seealso>
</element>
<element name="EqualDateTime.Result">
<short>
Returns <b>True</b> when the two dates are equal or both dates are null.
</short>
</element>
<element name="EqualDateTime.A">
<short>
TDateTime value compared in the routine.
</short>
</element>
<element name="EqualDateTime.B">
<short>
TDateTime value compared in the routine.
</short>
</element>

<element name="IsNullDate">
<short>
Determines whether the specified TDateTime argument contains an invalid value 
for the TDateTime type.
</short>
<descr/>
<seealso>
<link id="#rtl.math.IsNan">IsNan</link>
<link id="#rtl.math.IsInfinite">IsInfinite</link>
<link id="#rtl.sysutils.MaxDateTime">MaxDateTime</link>
<link id="#rtl.sysutils.MinDateTime">MinDateTime</link>
</seealso>
</element>
<element name="IsNullDate.Result">
<short>
Returns <b>True</b> if the specified value is Not A Number (NAN), contains the 
Infinite value, or is outside the minimum and maximum values for the type.
</short>
</element>
<element name="IsNullDate.DT">
<short>
TDateTime value examined in the routine.
</short>
</element>

<element name="dbgs">
<short>
Returns a formatted debugging message representing the specified set of 
TDateTimePart values.
</short>
<descr/>
<seealso>
<link id="TDateTimeParts"/>
<link id="TDateTimePart"/>
</seealso>
</element>
<element name="dbgs.Result">
<short>
String with the formatted debugging message for the values.
</short>
</element>
<element name="dbgs.Parts">
<short>
Set of TDateTimePart values included in the return value.
</short>
</element>

</module>
<!-- DateTimePicker -->
</package>
</fpdoc-descriptions>