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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.imagegrabwindow" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>imagegrabwindow</refname>
<refpurpose>Captures a window</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type class="union"><type>GdImage</type><type>false</type></type><methodname>imagegrabwindow</methodname>
<methodparam><type>int</type><parameter>handle</parameter></methodparam>
<methodparam choice="opt"><type>bool</type><parameter>client_area</parameter><initializer>&false;</initializer></methodparam>
</methodsynopsis>
<para>
Grabs a window or its client area using a windows handle (HWND property in COM instance)
</para>
<note>
<para>
This function is only available on Windows.
</para>
</note>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>handle</parameter></term>
<listitem>
<para>
The HWND window ID.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><parameter>client_area</parameter></term>
<listitem>
<para>
Include the client area of the application window.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
Returns an image object on success, &false; on failure.
</para>
</refsect1>
<refsect1 role="errors">
&reftitle.errors;
<para>
E_NOTICE is issued if <parameter>handle</parameter> is invalid
window handle.
E_WARNING is issued if the Windows API is too old.
</para>
</refsect1>
<refsect1 role="changelog">
&reftitle.changelog;
<informaltable>
<tgroup cols="2">
<thead>
<row>
<entry>&Version;</entry>
<entry>&Description;</entry>
</row>
</thead>
<tbody>
<row>
<entry>8.0.0</entry>
<entry>
On success, this function returns a <classname>GDImage</classname> instance now;
previously, a <type>resource</type> was returned.
</entry>
</row>
<row>
<entry>8.0.0</entry>
<entry>
<parameter>client_area</parameter> expects a <type>bool</type> now;
previously it expected an <type>int</type>.
</entry>
</row>
</tbody>
</tgroup>
</informaltable>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>imagegrabwindow</function> example</title>
<para>
Capture a window (IE for example)
</para>
<programlisting role="php">
<![CDATA[
<?php
$browser = new COM("InternetExplorer.Application");
$handle = $browser->HWND;
$browser->Visible = true;
$im = imagegrabwindow($handle);
$browser->Quit();
imagepng($im, "iesnap.png");
imagedestroy($im);
?>
]]>
</programlisting>
<para>
Capture a window (IE for example) but with its content
</para>
<programlisting role="php">
<![CDATA[
<?php
$browser = new COM("InternetExplorer.Application");
$handle = $browser->HWND;
$browser->Visible = true;
$browser->Navigate("http://www.libgd.org");
/* Still working? */
while ($browser->Busy) {
com_message_pump(4000);
}
$im = imagegrabwindow($handle, 0);
$browser->Quit();
imagepng($im, "iesnap.png");
imagedestroy($im);
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<simplelist>
<member><function>imagegrabscreen</function></member>
</simplelist>
</refsect1>
</refentry>
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