//
// Copyright (C) 2005 Novell, Inc. http://www.novell.com
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Author:
//
//	Jordi Mas i Hernandez, jordimash@gmail.com
//

using System.Runtime.InteropServices;
using System.Collections;
using System.Drawing.Printing;
using System.ComponentModel;
using System.Text;

namespace System.Drawing.Printing
{
	internal class PrintingServicesWin32 : PrintingServices
	{
//		private string printer_name;
		private bool is_printer_valid;

		internal PrintingServicesWin32 ()
		{

		}

		internal override bool IsPrinterValid(string printer)
		{
			if (printer == null | printer == String.Empty)
				return false;

			int ret = Win32DocumentProperties (IntPtr.Zero, IntPtr.Zero, printer, IntPtr.Zero, IntPtr.Zero, 0);
			is_printer_valid = (ret > 0);
//			this.printer_name = printer; 
			return is_printer_valid;
		}

		internal override void LoadPrinterSettings (string printer, PrinterSettings settings)
		{
			int ret;
			DEVMODE devmode;
			IntPtr hPrn = IntPtr.Zero;
			IntPtr ptr_dev = IntPtr.Zero;

			settings.maximum_copies = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_COPIES, IntPtr.Zero, IntPtr.Zero);

			ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_DUPLEX, IntPtr.Zero, IntPtr.Zero);
			settings.can_duplex = (ret == 1) ? true : false;

			ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_COLORDEVICE, IntPtr.Zero, IntPtr.Zero);
			settings.supports_color = (ret == 1) ? true : false;

			ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_ORIENTATION, IntPtr.Zero, IntPtr.Zero);
			if (ret != -1)
				settings.landscape_angle = ret;
			
			IntPtr dc = IntPtr.Zero;
			dc = Win32CreateIC (null, printer, null, IntPtr.Zero /* DEVMODE */);
			ret = Win32GetDeviceCaps (dc, (int)DevCapabilities.TECHNOLOGY);
			settings.is_plotter = ret == (int)PrinterType.DT_PLOTTER;
			Win32DeleteDC (dc);

			try {
				Win32OpenPrinter (printer, out hPrn, IntPtr.Zero);
				ret = Win32DocumentProperties (IntPtr.Zero, hPrn, null, IntPtr.Zero, IntPtr.Zero, 0);

				if (ret < 0)
					return;

				ptr_dev =  Marshal.AllocHGlobal (ret);
				ret = Win32DocumentProperties (IntPtr.Zero, hPrn, null, ptr_dev, IntPtr.Zero, 2);

				devmode = (DEVMODE) Marshal.PtrToStructure (ptr_dev, typeof(DEVMODE));

				LoadPrinterPaperSizes (printer, settings);
	        	foreach (PaperSize paper_size in settings.PaperSizes) {
					if ((int) paper_size.Kind ==  devmode.dmPaperSize) {
						settings.DefaultPageSettings.PaperSize = paper_size;
						break;
					}
				}

				LoadPrinterPaperSources (printer, settings);
				foreach (PaperSource paper_source in settings.PaperSources) {
					if ((int) paper_source.Kind ==  devmode.dmDefaultSource) {
						settings.DefaultPageSettings.PaperSource = paper_source;
						break;
					}
				}
	        	}
	        	finally {
	        		Win32ClosePrinter (hPrn);

	        		if (ptr_dev != IntPtr.Zero)
						Marshal.FreeHGlobal (ptr_dev);
	        	}


		}

		internal override void LoadPrinterResolutions (string printer, PrinterSettings settings)
		{
			int ret;
			IntPtr ptr, buff = IntPtr.Zero;

			settings.PrinterResolutions.Clear ();
			LoadDefaultResolutions (settings.PrinterResolutions);
			ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_ENUMRESOLUTIONS, IntPtr.Zero, IntPtr.Zero);

			if (ret == -1)
				return;

			ptr = buff = Marshal.AllocHGlobal (ret * 2 * Marshal.SizeOf (buff));
			ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_ENUMRESOLUTIONS, buff, IntPtr.Zero);
			int x, y;
			if (ret != -1) {
				for (int i = 0; i < ret; i++) {
					x = Marshal.ReadInt32 (ptr);
					ptr = new IntPtr (ptr.ToInt64 () + Marshal.SizeOf (x));
					y = Marshal.ReadInt32 (ptr);
					ptr = new IntPtr (ptr.ToInt64 () + Marshal.SizeOf (y));
					settings.PrinterResolutions.Add (new PrinterResolution
						(PrinterResolutionKind.Custom, x, y));
				}
			}
			Marshal.FreeHGlobal (buff);
		}

		void LoadPrinterPaperSizes (string printer, PrinterSettings settings)
		{
			int items, ret;
			IntPtr ptr_names, buff_names = IntPtr.Zero;
			IntPtr ptr_sizes, buff_sizes = IntPtr.Zero;
			IntPtr ptr_sizes_enum, buff_sizes_enum = IntPtr.Zero;
			string name;

			if (settings.PaperSizes == null)
				settings.paper_sizes = new PrinterSettings.PaperSizeCollection (new PaperSize [0]);
			else
				settings.PaperSizes.Clear ();

			items = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_PAPERSIZE, IntPtr.Zero, IntPtr.Zero);

			if (items == -1)
				return;

			try {
				ptr_sizes = buff_sizes = Marshal.AllocHGlobal (items * 2 * 4);
				ptr_names = buff_names = Marshal.AllocHGlobal (items * 64 * 2);
				ptr_sizes_enum = buff_sizes_enum = Marshal.AllocHGlobal (items * 2);
				ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_PAPERSIZE, buff_sizes, IntPtr.Zero);

				if (ret == -1) {
					// the finally clause will free the unmanaged memory before returning
					return;
				}

				ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_PAPERS, buff_sizes_enum, IntPtr.Zero);
				ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_PAPERNAMES, buff_names, IntPtr.Zero);

				int x, y;
				PaperSize ps;
				PaperKind kind;
				for (int i = 0; i < ret; i++) {
					x = Marshal.ReadInt32 (ptr_sizes, i * 8);
					y = Marshal.ReadInt32 (ptr_sizes, (i * 8) + 4);

					x = PrinterUnitConvert.Convert (x, PrinterUnit.TenthsOfAMillimeter,
					      PrinterUnit.Display);

					y = PrinterUnitConvert.Convert (y, PrinterUnit.TenthsOfAMillimeter,
					      PrinterUnit.Display);

					name  = Marshal.PtrToStringUni (ptr_names);
					ptr_names = new IntPtr (ptr_names.ToInt64 () + 64 * 2);

					kind = (PaperKind) Marshal.ReadInt16 (ptr_sizes_enum);
					ptr_sizes_enum = new IntPtr (ptr_sizes_enum.ToInt64 () + 2);

					ps = new PaperSize (name, x,y);
					ps.RawKind = (int)kind;
					settings.PaperSizes.Add (ps);
				}
			}
			finally {
				if (buff_names != IntPtr.Zero)
					Marshal.FreeHGlobal (buff_names);
				if (buff_sizes != IntPtr.Zero)
					Marshal.FreeHGlobal (buff_sizes);
				if (buff_sizes_enum != IntPtr.Zero)
					Marshal.FreeHGlobal (buff_sizes_enum);
			}
		}

		internal static bool StartDoc (GraphicsPrinter gr, string doc_name, string output_file)
		{
			DOCINFO di = new DOCINFO ();
			int ret;

			di.cbSize = Marshal.SizeOf (di);
  			di.lpszDocName = Marshal.StringToHGlobalUni (doc_name);
  			di.lpszOutput = IntPtr.Zero;
  			di.lpszDatatype = IntPtr.Zero;
  			di.fwType = 0;

  			ret = Win32StartDoc (gr.Hdc, ref di);
			Marshal.FreeHGlobal (di.lpszDocName);
			return (ret > 0) ? true : false;
		}

		void LoadPrinterPaperSources (string printer, PrinterSettings settings)
		{
			int items, ret;
			IntPtr ptr_names, buff_names = IntPtr.Zero;
			IntPtr ptr_bins, buff_bins = IntPtr.Zero;
			PaperSourceKind kind;
			string name;

			if (settings.PaperSources == null)
				settings.paper_sources = new PrinterSettings.PaperSourceCollection (new PaperSource [0]);
			else
				settings.PaperSources.Clear ();

			items = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_BINNAMES, IntPtr.Zero, IntPtr.Zero);

			if (items == -1)
				return;

			try {
				ptr_names = buff_names = Marshal.AllocHGlobal (items * 2 * 24);
				ptr_bins = buff_bins = Marshal.AllocHGlobal (items * 2);

				ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_BINNAMES, buff_names, IntPtr.Zero);

				if (ret == -1) {
					// the finally clause will free the unmanaged memory before returning
					return;
				}

				ret = Win32DeviceCapabilities (printer, null, DCCapabilities.DC_BINS, buff_bins, IntPtr.Zero);

				for (int i = 0; i < ret; i++) {
					name  = Marshal.PtrToStringUni (ptr_names);
					kind = (PaperSourceKind) Marshal.ReadInt16 (ptr_bins);
					settings.PaperSources.Add (new PaperSource (kind, name));

					ptr_names = new IntPtr (ptr_names.ToInt64 () + 24 * 2);
					ptr_bins = new IntPtr (ptr_bins.ToInt64 () + 2);
				}

			}
			finally {
				if (buff_names != IntPtr.Zero)
					Marshal.FreeHGlobal (buff_names);

				if (buff_bins != IntPtr.Zero)
					Marshal.FreeHGlobal (buff_bins);

			}

		}

		internal static bool StartPage (GraphicsPrinter gr)
		{
			int ret = Win32StartPage (gr.Hdc);
			return (ret > 0) ? true : false;
		}

		internal static bool EndPage (GraphicsPrinter gr)
		{
			int ret = Win32EndPage (gr.Hdc);
			return (ret > 0) ? true : false;
		}

		internal static bool EndDoc (GraphicsPrinter gr)
		{
			int ret = Win32EndDoc (gr.Hdc);
			Win32DeleteDC (gr.Hdc);
			gr.Graphics.Dispose ();
			return (ret > 0) ? true : false;
		}

		internal static IntPtr CreateGraphicsContext (PrinterSettings settings, PageSettings default_page_settings)
		{
			IntPtr dc = IntPtr.Zero;
			dc = Win32CreateDC (null, settings.PrinterName, null, IntPtr.Zero /* DEVMODE */);
			return dc;
		}

		// Properties
		internal override string DefaultPrinter {
			get {
				StringBuilder name = new StringBuilder (1024);
				int length = name.Capacity;

				if (Win32GetDefaultPrinter (name, ref length) > 0)
					if (IsPrinterValid(name.ToString()))
						return name.ToString ();
				return String.Empty;
			}
		}

		internal static PrinterSettings.StringCollection InstalledPrinters {
			get {
				PrinterSettings.StringCollection col = new PrinterSettings.StringCollection (new string[] {});
				PRINTER_INFO printer_info;
				uint cbNeeded = 0, printers = 0;
				IntPtr ptr, buff;
				string s;

				// Determine space needed
        		Win32EnumPrinters ((int)EnumPrinters.PRINTER_ENUM_CONNECTIONS | (int)EnumPrinters.PRINTER_ENUM_LOCAL,
            			null, 2, IntPtr.Zero, 0, ref cbNeeded, ref printers);

				if (cbNeeded <= 0)
					return col;

       			ptr = buff = Marshal.AllocHGlobal ((int) cbNeeded);

				try {
					// Give us the printer list
					Win32EnumPrinters ((int)EnumPrinters.PRINTER_ENUM_CONNECTIONS | (int)EnumPrinters.PRINTER_ENUM_LOCAL,
						null, 2, buff, (uint)cbNeeded, ref cbNeeded, ref printers);

					for (int i = 0; i < printers; i++) {
			            		printer_info = (PRINTER_INFO) Marshal.PtrToStructure (ptr, typeof (PRINTER_INFO));
	            				s  = Marshal.PtrToStringUni (printer_info.pPrinterName);
			            		col.Add (s);
			            		ptr = new IntPtr (ptr.ToInt64 () + Marshal.SizeOf (printer_info));
					}
				}
				finally {
					Marshal.FreeHGlobal (buff);
				}
				return col;
			}
		}

		internal override void GetPrintDialogInfo (string printer, ref string port, ref string type, ref string status, ref string comment)
		{
			IntPtr hPrn;
			PRINTER_INFO printer_info = new PRINTER_INFO ();
			int needed = 0;
			IntPtr ptr;

			Win32OpenPrinter (printer, out hPrn, IntPtr.Zero);

			if (hPrn == IntPtr.Zero)
				return;

			Win32GetPrinter (hPrn, 2, IntPtr.Zero, 0, ref needed);
			ptr = Marshal.AllocHGlobal (needed);

			Win32GetPrinter (hPrn, 2, ptr, needed, ref needed);
			printer_info = (PRINTER_INFO) Marshal.PtrToStructure (ptr, typeof (PRINTER_INFO));
			Marshal.FreeHGlobal (ptr);

			port  = Marshal.PtrToStringUni (printer_info.pPortName);
			comment  = Marshal.PtrToStringUni (printer_info.pComment);
			type  = Marshal.PtrToStringUni (printer_info.pDriverName);
			status = GetPrinterStatusMsg (printer_info.Status);

			Win32ClosePrinter (hPrn);
		}

		private string GetPrinterStatusMsg (uint status)
		{
			string rslt = string.Empty;

			if (status == 0)
				return "Ready";

			if ((status & (uint) PrinterStatus.PS_PAUSED) != 0) rslt += "Paused; ";
			if ((status & (uint) PrinterStatus.PS_ERROR) != 0) rslt += "Error; ";
			if ((status & (uint) PrinterStatus.PS_PENDING_DELETION) != 0) rslt += "Pending deletion; ";
			if ((status & (uint) PrinterStatus.PS_PAPER_JAM) != 0) rslt += "Paper jam; ";
			if ((status & (uint) PrinterStatus.PS_PAPER_OUT) != 0) rslt += "Paper out; ";
			if ((status & (uint) PrinterStatus.PS_MANUAL_FEED) != 0) rslt += "Manual feed; ";
			if ((status & (uint) PrinterStatus.PS_PAPER_PROBLEM) != 0) rslt += "Paper problem; ";
			if ((status & (uint) PrinterStatus.PS_OFFLINE) != 0) rslt += "Offline; ";
			if ((status & (uint) PrinterStatus.PS_IO_ACTIVE) != 0) rslt += "I/O active; ";
			if ((status & (uint) PrinterStatus.PS_BUSY) != 0) rslt += "Busy; ";
			if ((status & (uint) PrinterStatus.PS_PRINTING) != 0) rslt += "Printing; ";
			if ((status & (uint) PrinterStatus.PS_OUTPUT_BIN_FULL) != 0) rslt += "Output bin full; ";
			if ((status & (uint) PrinterStatus.PS_NOT_AVAILABLE) != 0) rslt += "Not available; ";
			if ((status & (uint) PrinterStatus.PS_WAITING) != 0) rslt += "Waiting; ";
			if ((status & (uint) PrinterStatus.PS_PROCESSING) != 0) rslt += "Processing; ";
			if ((status & (uint) PrinterStatus.PS_INITIALIZING) != 0) rslt += "Initializing; ";
			if ((status & (uint) PrinterStatus.PS_WARMING_UP) != 0) rslt += "Warming up; ";
			if ((status & (uint) PrinterStatus.PS_TONER_LOW) != 0) rslt += "Toner low; ";
			if ((status & (uint) PrinterStatus.PS_NO_TONER) != 0) rslt += "No toner; ";
			if ((status & (uint) PrinterStatus.PS_PAGE_PUNT) != 0) rslt += "Page punt; ";
			if ((status & (uint) PrinterStatus.PS_USER_INTERVENTION) != 0) rslt += "User intervention; ";
			if ((status & (uint) PrinterStatus.PS_OUT_OF_MEMORY) != 0) rslt += "Out of memory; ";
			if ((status & (uint) PrinterStatus.PS_DOOR_OPEN) != 0) rslt += "Door open; ";
			if ((status & (uint) PrinterStatus.PS_SERVER_UNKNOWN) != 0) rslt += "Server unkown; ";
			if ((status & (uint) PrinterStatus.PS_POWER_SAVE) != 0) rslt += "Power save; ";

			return rslt;
		}

		//
		// DllImports
		//

		[DllImport("winspool.drv", CharSet=CharSet.Unicode, EntryPoint="OpenPrinter", SetLastError=true)]
		static extern int Win32OpenPrinter (string pPrinterName, out IntPtr phPrinter, IntPtr pDefault);

		[DllImport("winspool.drv", CharSet=CharSet.Unicode, EntryPoint="GetPrinter", SetLastError=true)]
		static extern int Win32GetPrinter (IntPtr hPrinter, int level, IntPtr dwBuf, int size, ref int dwNeeded);

		[DllImport("winspool.drv", CharSet=CharSet.Unicode, EntryPoint="ClosePrinter", SetLastError=true)]
		static extern int Win32ClosePrinter (IntPtr hPrinter);

		[DllImport("winspool.drv", CharSet=CharSet.Unicode, EntryPoint="DeviceCapabilities", SetLastError=true)]
		static extern int Win32DeviceCapabilities (string device, string port, DCCapabilities cap, IntPtr outputBuffer, IntPtr deviceMode);

		[DllImport("winspool.drv", CharSet=CharSet.Unicode, EntryPoint="EnumPrinters", SetLastError=true)]
		static extern int Win32EnumPrinters (int Flags, string Name, uint Level, IntPtr pPrinterEnum, uint cbBuf,
    			ref uint pcbNeeded, ref uint pcReturned);

      	[DllImport("winspool.drv", EntryPoint="GetDefaultPrinter", CharSet=CharSet.Unicode, SetLastError=true)]
      	private static extern int Win32GetDefaultPrinter (StringBuilder buffer, ref int bufferSize);

		[DllImport("winspool.drv", EntryPoint="DocumentProperties", CharSet=CharSet.Unicode, SetLastError=true)]
		private static extern int Win32DocumentProperties (IntPtr hwnd, IntPtr hPrinter, string pDeviceName,
			IntPtr pDevModeOutput, IntPtr pDevModeInput, int fMode);

    	[DllImport("gdi32.dll", EntryPoint="CreateDC")]
		static extern IntPtr Win32CreateDC (string lpszDriver, string lpszDevice,
   			string lpszOutput, IntPtr lpInitData);

    	[DllImport("gdi32.dll", EntryPoint="CreateIC")]
		static extern IntPtr Win32CreateIC (string lpszDriver, string lpszDevice,
   			string lpszOutput, IntPtr lpInitData);

   		[DllImport("gdi32.dll", CharSet=CharSet.Unicode, EntryPoint="StartDoc")]
		static extern int Win32StartDoc (IntPtr hdc, [In] ref DOCINFO lpdi);

		[DllImport("gdi32.dll", EntryPoint="StartPage")]
		static extern int Win32StartPage (IntPtr hDC);

		[DllImport("gdi32.dll", EntryPoint="EndPage")]
		static extern int Win32EndPage (IntPtr hdc);

		[DllImport("gdi32.dll", EntryPoint="EndDoc")]
		static extern int Win32EndDoc (IntPtr hdc);

		[DllImport("gdi32.dll", EntryPoint="DeleteDC")]
  		public static extern IntPtr Win32DeleteDC (IntPtr hDc);

		[DllImport("gdi32.dll", EntryPoint="GetDeviceCaps")]
  		public static extern int Win32GetDeviceCaps (IntPtr hDc, int index);

		//
		// Structs
		//
		[StructLayout (LayoutKind.Sequential)]
		internal struct PRINTER_INFO
		{
			public IntPtr	pServerName;
			public IntPtr	pPrinterName;
			public IntPtr	pShareName;
			public IntPtr	pPortName;
			public IntPtr	pDriverName;
			public IntPtr	pComment;
			public IntPtr	pLocation;
			public IntPtr	pDevMode;
			public IntPtr	pSepFile;
			public IntPtr	pPrintProcessor;
			public IntPtr	pDatatype;
			public IntPtr	pParameters;
			public IntPtr	pSecurityDescriptor;
			public uint	Attributes;
			public uint	Priority;
			public uint	DefaultPriority;
			public uint	StartTime;
			public uint	UntilTime;
			public uint	Status;
			public uint	cJobs;
			public uint	AveragePPM;
    	}

    	[StructLayout (LayoutKind.Sequential)]
		internal struct DOCINFO
		{
  			public int     	cbSize;
  			public IntPtr	lpszDocName;
  			public IntPtr	lpszOutput;
  			public IntPtr	lpszDatatype;
  			public int	fwType;
  		}

		[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
		internal struct DEVMODE
		{
			[MarshalAs(UnmanagedType.ByValTStr,SizeConst=32)]
			public string	dmDeviceName;
			public short	dmSpecVersion;
			public short	dmDriverVersion;
			public short	dmSize;
			public short	dmDriverExtra;
			public int	dmFields;

			public short	dmOrientation;
			public short	dmPaperSize;
			public short	dmPaperLength;
			public short	dmPaperWidth;

			public short	dmScale;
			public short	dmCopies;
			public short	dmDefaultSource;
			public short	dmPrintQuality;
			public short	dmColor;
			public short	dmDuplex;
			public short	dmYResolution;
			public short	dmTTOption;
			public short	dmCollate;
			[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
			public string	dmFormName;
			public short	dmLogPixels;
			public short	dmBitsPerPel;
			public int	dmPelsWidth;
			public int	dmPelsHeight;
			public int	dmDisplayFlags;
			public int	dmDisplayFrequency;
			public int	dmICMMethod;
			public int	dmICMIntent;
			public int	dmMediaType;
			public int	dmDitherType;
			public int	dmReserved1;
			public int	dmReserved2;
			public int	dmPanningWidth;
			public int	dmPanningHeight;
		}

  		// Enums
  		internal enum DCCapabilities : short
		{
			DC_FIELDS = 1,
			DC_PAPERS = 2,
			DC_PAPERSIZE = 3,
			DC_MINEXTENT = 4,
			DC_MAXEXTENT = 5,
			DC_BINS = 6,
			DC_DUPLEX = 7,
			DC_SIZE = 8,
			DC_EXTRA = 9,
			DC_VERSION = 10,
			DC_DRIVER = 11,
			DC_BINNAMES = 12,
			DC_ENUMRESOLUTIONS = 13,
			DC_FILEDEPENDENCIES = 14,
			DC_TRUETYPE = 15,
			DC_PAPERNAMES = 16,
			DC_ORIENTATION = 17,
			DC_COPIES = 18,
			DC_BINADJUST = 19,
			DC_EMF_COMPLIANT = 20,
			DC_DATATYPE_PRODUCED = 21,
			DC_COLLATE = 22,
			DC_MANUFACTURER = 23,
			DC_MODEL = 24,
			DC_PERSONALITY = 25,
			DC_PRINTRATE = 26,
			DC_PRINTRATEUNIT = 27,
			DC_PRINTERMEM = 28,
			DC_MEDIAREADY = 29,
			DC_STAPLE = 30,
			DC_PRINTRATEPPM = 31,
			DC_COLORDEVICE = 32,
			DC_NUP = 33
		}

		[Flags]
		internal enum PrinterStatus : uint
		{
			PS_PAUSED =		0x00000001,
			PS_ERROR = 		0x00000002,
			PS_PENDING_DELETION =	0x00000004,
			PS_PAPER_JAM = 		0x00000008,
			PS_PAPER_OUT = 		0x00000010,
			PS_MANUAL_FEED = 	0x00000020,
			PS_PAPER_PROBLEM = 	0x00000040,
			PS_OFFLINE = 		0x00000080,
			PS_IO_ACTIVE = 		0x00000100,
			PS_BUSY = 		0x00000200,
			PS_PRINTING	= 	0x00000400,
			PS_OUTPUT_BIN_FULL = 	0x00000800,
			PS_NOT_AVAILABLE = 	0x00001000,
			PS_WAITING = 		0x00002000,
			PS_PROCESSING = 	0x00004000,
			PS_INITIALIZING = 	0x00008000,
			PS_WARMING_UP = 	0x00010000,
			PS_TONER_LOW =		0x00020000,
			PS_NO_TONER =		0x00040000,
			PS_PAGE_PUNT = 		0x00080000,
			PS_USER_INTERVENTION =	0x00100000,
			PS_OUT_OF_MEMORY = 	0x00200000,
			PS_DOOR_OPEN = 		0x00400000,
			PS_SERVER_UNKNOWN = 	0x00800000,
			PS_POWER_SAVE = 	0x01000000
 		}
 		
 		// for use in GetDeviceCaps
		internal enum DevCapabilities
		{
			TECHNOLOGY	= 2,
		}
		
		internal enum PrinterType
		{
			DT_PLOTTER		= 0, // Vector Plotter
			DT_RASDIPLAY	= 1, // Raster Display
			DT_RASPRINTER	= 2, // Raster printer
			DT_RASCAMERA	= 3, // Raster camera
			DT_CHARSTREAM	= 4, // Character-stream, PLP
			DT_METAFILE		= 5, // Metafile, VDM
			DT_DISPFILE		= 6, // Display-file
		}

		[Flags]
		internal enum EnumPrinters: uint
		{
			PRINTER_ENUM_DEFAULT 		= 0x1,
			PRINTER_ENUM_LOCAL   		= 0x2,
			PRINTER_ENUM_CONNECTIONS 	= 0x4,
			PRINTER_ENUM_FAVORITE 		= 0x4,
			PRINTER_ENUM_NAME 			= 0x8,
			PRINTER_ENUM_REMOTE 		= 0x10,
			PRINTER_ENUM_SHARED 		= 0x20,
			PRINTER_ENUM_NETWORK 		= 0x40,
		}
 	}

	class GlobalPrintingServicesWin32 : GlobalPrintingServices
	{
		internal override PrinterSettings.StringCollection InstalledPrinters {
			get {
				return PrintingServicesWin32.InstalledPrinters;
			}
		}

		internal override IntPtr CreateGraphicsContext (PrinterSettings settings, PageSettings default_page_settings)
		{
			return PrintingServicesWin32.CreateGraphicsContext (settings, default_page_settings);
		}

		internal override bool StartDoc (GraphicsPrinter gr, string doc_name, string output_file)
		{
			return PrintingServicesWin32.StartDoc (gr, doc_name, output_file);
		}

		internal override bool EndDoc (GraphicsPrinter gr)
		{
			return PrintingServicesWin32.EndDoc (gr);
		}

		internal override bool StartPage (GraphicsPrinter gr)
		{
			return PrintingServicesWin32.StartPage (gr);
		}

		internal override bool EndPage (GraphicsPrinter gr)
		{
			return PrintingServicesWin32.EndPage (gr);
		}
	}
}