Use the PrintSpoolerAPI SetForm () function in C #

Question

I am working on a Windows Forms application in which I want to print my own document. This custom document has a custom size, and I have to set the default print page size using C # code.

I scanned Google and came across PrintSpoolerAPI . The code I found will add a custom form / page using the AddForm() method to the list of available pages for printing. I also want to set this newly added page as the default print page.

I tried to write this line in code

 bool x = SetForm(hPrinter, paperName, 1, ref formInfo); 

It returns true , but does not set the default print page.

Does dmPaperSize any role in this?

Here is the complete code:

 using System; using System.Text; using System.Runtime.InteropServices; using System.Security; using System.ComponentModel; using System.Drawing.Printing; namespace WindowsFormsApplication1 { public class CustomPrintForm { [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct structPrinterDefaults { [MarshalAs(UnmanagedType.LPTStr)] public String pDatatype; public IntPtr pDevMode; [MarshalAs(UnmanagedType.I4)] public int DesiredAccess; }; [DllImport("winspool.Drv", EntryPoint = "OpenPrinter", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPTStr)] string printerName, out IntPtr phPrinter, ref structPrinterDefaults pd); [DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool ClosePrinter(IntPtr phPrinter); [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct structSize { public Int32 width; public Int32 height; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct structRect { public Int32 left; public Int32 top; public Int32 right; public Int32 bottom; } [StructLayout(LayoutKind.Explicit, CharSet = CharSet.Unicode)] internal struct FormInfo1 { [FieldOffset(0), MarshalAs(UnmanagedType.I4)] public uint Flags; [FieldOffset(4), MarshalAs(UnmanagedType.LPWStr)] public String pName; [FieldOffset(8)] public structSize Size; [FieldOffset(16)] public structRect ImageableArea; }; [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi/* changed from CharSet=CharSet.Auto */)] internal struct structDevMode { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public String dmDeviceName; [MarshalAs(UnmanagedType.U2)] public short dmSpecVersion; [MarshalAs(UnmanagedType.U2)] public short dmDriverVersion; [MarshalAs(UnmanagedType.U2)] public short dmSize; [MarshalAs(UnmanagedType.U2)] public short dmDriverExtra; [MarshalAs(UnmanagedType.U4)] public int dmFields; [MarshalAs(UnmanagedType.I2)] public short dmOrientation; [MarshalAs(UnmanagedType.I2)] public short dmPaperSize; [MarshalAs(UnmanagedType.I2)] public short dmPaperLength; [MarshalAs(UnmanagedType.I2)] public short dmPaperWidth; [MarshalAs(UnmanagedType.I2)] public short dmScale; [MarshalAs(UnmanagedType.I2)] public short dmCopies; [MarshalAs(UnmanagedType.I2)] public short dmDefaultSource; [MarshalAs(UnmanagedType.I2)] public short dmPrintQuality; [MarshalAs(UnmanagedType.I2)] public short dmColor; [MarshalAs(UnmanagedType.I2)] public short dmDuplex; [MarshalAs(UnmanagedType.I2)] public short dmYResolution; [MarshalAs(UnmanagedType.I2)] public short dmTTOption; [MarshalAs(UnmanagedType.I2)] public short dmCollate; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public String dmFormName; [MarshalAs(UnmanagedType.U2)] public short dmLogPixels; [MarshalAs(UnmanagedType.U4)] public int dmBitsPerPel; [MarshalAs(UnmanagedType.U4)] public int dmPelsWidth; [MarshalAs(UnmanagedType.U4)] public int dmPelsHeight; [MarshalAs(UnmanagedType.U4)] public int dmNup; [MarshalAs(UnmanagedType.U4)] public int dmDisplayFrequency; [MarshalAs(UnmanagedType.U4)] public int dmICMMethod; [MarshalAs(UnmanagedType.U4)] public int dmICMIntent; [MarshalAs(UnmanagedType.U4)] public int dmMediaType; [MarshalAs(UnmanagedType.U4)] public int dmDitherType; [MarshalAs(UnmanagedType.U4)] public int dmReserved1; [MarshalAs(UnmanagedType.U4)] public int dmReserved2; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct PRINTER_INFO_9 { public IntPtr pDevMode; } [DllImport("winspool.Drv", EntryPoint = "AddFormW", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool AddForm( IntPtr phPrinter, [MarshalAs(UnmanagedType.I4)] int level, ref FormInfo1 form); [DllImport("winspool.Drv", EntryPoint = "SetForm", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool SetForm(IntPtr phPrinter, string paperName, [MarshalAs(UnmanagedType.I4)] int level, ref FormInfo1 form); [DllImport("winspool.Drv", EntryPoint = "DeleteForm", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool DeleteForm( IntPtr phPrinter, [MarshalAs(UnmanagedType.LPTStr)] string pName); [DllImport("kernel32.dll", EntryPoint = "GetLastError", SetLastError = false, ExactSpelling = true, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern Int32 GetLastError(); [DllImport("GDI32.dll", EntryPoint = "CreateDC", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern IntPtr CreateDC([MarshalAs(UnmanagedType.LPTStr)] string pDrive, [MarshalAs(UnmanagedType.LPTStr)] string pName, [MarshalAs(UnmanagedType.LPTStr)] string pOutput, ref structDevMode pDevMode); [DllImport("GDI32.dll", EntryPoint = "ResetDC", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern IntPtr ResetDC( IntPtr hDC, ref structDevMode pDevMode); [DllImport("GDI32.dll", EntryPoint = "DeleteDC", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool DeleteDC(IntPtr hDC); [DllImport("winspool.Drv", EntryPoint = "SetPrinterA", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool SetPrinter( IntPtr hPrinter, [MarshalAs(UnmanagedType.I4)] int level, IntPtr pPrinter, [MarshalAs(UnmanagedType.I4)] int command); /* LONG DocumentProperties( HWND hWnd, // handle to parent window HANDLE hPrinter, // handle to printer object LPTSTR pDeviceName, // device name PDEVMODE pDevModeOutput, // modified device mode PDEVMODE pDevModeInput, // original device mode DWORD fMode // mode options ); */ [DllImport("winspool.Drv", EntryPoint = "DocumentPropertiesA", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern int DocumentProperties( IntPtr hwnd, IntPtr hPrinter, [MarshalAs(UnmanagedType.LPStr)] string pDeviceName /* changed from String to string */, IntPtr pDevModeOutput, IntPtr pDevModeInput, int fMode ); [DllImport("winspool.Drv", EntryPoint = "GetPrinterA", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool GetPrinter( IntPtr hPrinter, int dwLevel /* changed type from Int32 */, IntPtr pPrinter, int dwBuf /* chagned from Int32*/, out int dwNeeded /* changed from Int32*/ ); // SendMessageTimeout tools [Flags] public enum SendMessageTimeoutFlags : uint { SMTO_NORMAL = 0x0000, SMTO_BLOCK = 0x0001, SMTO_ABORTIFHUNG = 0x0002, SMTO_NOTIMEOUTIFNOTHUNG = 0x0008 } const int WM_SETTINGCHANGE = 0x001A; const int HWND_BROADCAST = 0xffff; [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] public static extern IntPtr SendMessageTimeout( IntPtr windowHandle, uint Msg, IntPtr wParam, IntPtr lParam, SendMessageTimeoutFlags flags, uint timeout, out IntPtr result ); public static void AddMjm80MmPaperSizeToDefaultPrinter() { AddCustomPaperSizeToDefaultPrinter("MJM 80mm * Receipt Length", 80.1f, 4003.9f); } public static void AddMjm104MmPaperSizeToDefaultPrinter() { AddCustomPaperSizeToDefaultPrinter("MJM 104mm * Receipt Length", 104.1f, 4003.9f); } /// <summary> /// Adds the printer form to the default printer /// </summary> /// <param name="paperName">Name of the printer form</param> /// <param name="widthMm">Width given in millimeters</param> /// <param name="heightMm">Height given in millimeters</param> public static void AddCustomPaperSizeToDefaultPrinter(string paperName, float widthMm, float heightMm) { PrintDocument pd = new PrintDocument(); string sPrinterName = pd.PrinterSettings.PrinterName; AddCustomPaperSize(sPrinterName, paperName, widthMm, heightMm); } /// <summary> /// Add the printer form to a printer /// </summary> /// <param name="printerName">The printer name</param> /// <param name="paperName">Name of the printer form</param> /// <param name="widthMm">Width given in millimeters</param> /// <param name="heightMm">Height given in millimeters</param> public static void AddCustomPaperSize(string printerName, string paperName, float widthMm, float heightMm) { if (PlatformID.Win32NT == Environment.OSVersion.Platform) { // The code to add a custom paper size is different for Windows NT then it is // for previous versions of windows const int PRINTER_ACCESS_USE = 0x00000008; const int PRINTER_ACCESS_ADMINISTER = 0x00000004; const int FORM_PRINTER = 0x00000002; structPrinterDefaults defaults = new structPrinterDefaults(); defaults.pDatatype = null; defaults.pDevMode = IntPtr.Zero; defaults.DesiredAccess = PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE; IntPtr hPrinter = IntPtr.Zero; // Open the printer. if (OpenPrinter(printerName, out hPrinter, ref defaults)) { try { // delete the form incase it already exists DeleteForm(hPrinter, paperName); // create and initialize the FORM_INFO_1 structure FormInfo1 formInfo = new FormInfo1(); formInfo.Flags = 0; formInfo.pName = paperName; // all sizes in 1000ths of millimeters formInfo.Size.width = (int)(widthMm * 1000.0); formInfo.Size.height = (int)(heightMm * 1000.0); formInfo.ImageableArea.left = 0; formInfo.ImageableArea.right = formInfo.Size.width; formInfo.ImageableArea.top = 0; formInfo.ImageableArea.bottom = formInfo.Size.height; if (!AddForm(hPrinter, 1, ref formInfo)) { StringBuilder strBuilder = new StringBuilder(); strBuilder.AppendFormat("Failed to add the custom paper size {0} to the printer {1}, System error number: {2}", paperName, printerName, GetLastError()); throw new ApplicationException(strBuilder.ToString()); } else { bool x = SetForm(hPrinter, paperName, 1, ref formInfo); } // INIT const int DM_OUT_BUFFER = 2; const int DM_IN_BUFFER = 8; structDevMode devMode = new structDevMode(); IntPtr hPrinterInfo, hDummy; PRINTER_INFO_9 printerInfo; printerInfo.pDevMode = IntPtr.Zero; int iPrinterInfoSize, iDummyInt; // GET THE SIZE OF THE DEV_MODE BUFFER int iDevModeSize = DocumentProperties(IntPtr.Zero, hPrinter, printerName, IntPtr.Zero, IntPtr.Zero, 0); if (iDevModeSize < 0) throw new ApplicationException("Cannot get the size of the DEVMODE structure."); // ALLOCATE THE BUFFER IntPtr hDevMode = Marshal.AllocCoTaskMem(iDevModeSize + 100); // GET A POINTER TO THE DEV_MODE BUFFER int iRet = DocumentProperties(IntPtr.Zero, hPrinter, printerName, hDevMode, IntPtr.Zero, DM_OUT_BUFFER); if (iRet < 0) throw new ApplicationException("Cannot get the DEVMODE structure."); // FILL THE DEV_MODE STRUCTURE devMode = (structDevMode)Marshal.PtrToStructure(hDevMode, devMode.GetType()); // SET THE FORM NAME FIELDS TO INDICATE THAT THIS FIELD WILL BE MODIFIED devMode.dmFields = 0x10000; // DM_FORMNAME // SET THE FORM NAME devMode.dmFormName = paperName; // PUT THE DEV_MODE STRUCTURE BACK INTO THE POINTER Marshal.StructureToPtr(devMode, hDevMode, true); // MERGE THE NEW CHAGES WITH THE OLD iRet = DocumentProperties(IntPtr.Zero, hPrinter, printerName, printerInfo.pDevMode, printerInfo.pDevMode, DM_IN_BUFFER | DM_OUT_BUFFER); if (iRet < 0) throw new ApplicationException("Unable to set the orientation setting for this printer."); // GET THE PRINTER INFO SIZE GetPrinter(hPrinter, 9, IntPtr.Zero, 0, out iPrinterInfoSize); if (iPrinterInfoSize == 0) throw new ApplicationException("GetPrinter failed. Couldn't get the # bytes needed for shared PRINTER_INFO_9 structure"); // ALLOCATE THE BUFFER hPrinterInfo = Marshal.AllocCoTaskMem(iPrinterInfoSize + 100); // GET A POINTER TO THE PRINTER INFO BUFFER bool bSuccess = GetPrinter(hPrinter, 9, hPrinterInfo, iPrinterInfoSize, out iDummyInt); if (!bSuccess) throw new ApplicationException("GetPrinter failed. Couldn't get the shared PRINTER_INFO_9 structure"); // FILL THE PRINTER INFO STRUCTURE printerInfo = (PRINTER_INFO_9)Marshal.PtrToStructure(hPrinterInfo, printerInfo.GetType()); printerInfo.pDevMode = hDevMode; // GET A POINTER TO THE PRINTER INFO STRUCTURE Marshal.StructureToPtr(printerInfo, hPrinterInfo, true); // SET THE PRINTER SETTINGS bSuccess = SetPrinter(hPrinter, 9, hPrinterInfo, 0); if (!bSuccess) throw new Win32Exception(Marshal.GetLastWin32Error(), "SetPrinter() failed. Couldn't set the printer settings"); // Tell all open programs that this change occurred. SendMessageTimeout(new IntPtr(HWND_BROADCAST), WM_SETTINGCHANGE, IntPtr.Zero, IntPtr.Zero, CustomPrintForm.SendMessageTimeoutFlags.SMTO_NORMAL, 1000, out hDummy); } finally { ClosePrinter(hPrinter); } } else { StringBuilder strBuilder = new StringBuilder(); strBuilder.AppendFormat("Failed to open the {0} printer, System error number: {1}", printerName, GetLastError()); throw new ApplicationException(strBuilder.ToString()); } } else { structDevMode pDevMode = new structDevMode(); IntPtr hDC = CreateDC(null, printerName, null, ref pDevMode); if (hDC != IntPtr.Zero) { const long DM_PAPERSIZE = 0x00000002L; const long DM_PAPERLENGTH = 0x00000004L; const long DM_PAPERWIDTH = 0x00000008L; pDevMode.dmFields = (int)(DM_PAPERSIZE | DM_PAPERWIDTH | DM_PAPERLENGTH); pDevMode.dmPaperSize = 256; pDevMode.dmPaperWidth = (short)(widthMm * 1000.0); pDevMode.dmPaperLength = (short)(heightMm * 1000.0); ResetDC(hDC, ref pDevMode); DeleteDC(hDC); } } } } 

}

Need help solving this problem.

Answer 1

Your code is very nearly flawless (requires work in 64-bit mode) and does what it intends to do:

This, however, is when the good news ends. And you use negotiations directly with the printer driver, and this is responsible for making your DEVMODE changes effective. This is great for the XPS printer driver, and not for many other drivers. Like the Hewlett Packard driver, I also tried.

Everything you do has an immediately visible side effect in the registry. You can see it using Regedit.exe. This is a good way to double check your code. And to make sure of this, you need to stop trying, because the printer driver will not interact. Keys you want to look at:

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Forms. This key lists the form you are adding. You should not have a problem with this.

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Forms \ MJM 80mm * Receipt length, the value is "FormKeyword". Make a note of this that is the "keyword" by which your form is selected by the printer.

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Printers \ printername, the value is "Default DevMode". This is written when SetPrinter () is called. You can see the hexadecimal dump of the value. The FormKeyword recorded in the previous step is displayed at offset 0x348

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Printers \ printername \ DsDriver, printMediaSupported value. Not quite sure about this, but should show a list of paper sizes, and your custom form should be visible there.

Sorry for the bad news, printers suck.

Answer 2

for use x64

 [StructLayout(LayoutKind.Explicit, CharSet = CharSet.Unicode)] internal struct FormInfo1 { [FieldOffset(0), MarshalAs(UnmanagedType.I4)] public uint Flags; [FieldOffset(8), MarshalAs(UnmanagedType.LPWStr)] public String pName; [FieldOffset(16)] public structSize Size; [FieldOffset(24)] public structRect ImageableArea; }; 

Answer 3

Thanks to the Nilesh code and the Hans register information, my requirement is to set the default for a particular printer using C #, and then open a web browser to print a specific web page.

So far, I have tried to add my own page form and set the default dmFormName for it. Then I get devmode struct again, dmFormName is what I changed, but when I open notepad or other application and try to print something, I see that the default size is not what I set.

I also tried to delete all unused pages, so that by default there was only one, but only one added by me could be deleted.

PS: I am refactoring the code as follows:

 internal class PrinterPagaSize { public void DeleteAllPrintForm(string printerName) { structPrinterDefaults defaults = InitPrinterDefaults(); IntPtr hPrinter = IntPtr.Zero; if (OpenPrinter(printerName, out hPrinter, ref defaults)) { try { var printerSettings = PrinterSelector.DefaultPrinterSettings; foreach (PaperSize ps in printerSettings.PaperSizes) { bool ret = DeleteForm(hPrinter, ps.PaperName); Debug.WriteLine("delete ret:" + ret.ToString()); } } finally { ClosePrinter(hPrinter); } } } public PaperSize GetPrintForm(string printerName, string paperName) { PaperSize paper = null; //var printer = new System.Drawing.Printing.PrinterSettings {PrinterName = printerName}; var printer = PrinterSelector.DefaultPrinterSettings; foreach (PaperSize ps in printer.PaperSizes) { if (ps.PaperName.ToLower() == paperName.ToLower()) { paper = ps; break; } } return paper; } /// <summary> /// Add the printer form to a printer /// </summary> /// <param name="printerName">The printer name</param> /// <param name="paperName">Name of the printer form</param> /// <param name="widthMm">Width given in millimeters</param> /// <param name="heightMm">Height given in millimeters</param> public void AddCustomPaperSize(string printerName, string paperName, float width, float height) { if (PlatformID.Win32NT == Environment.OSVersion.Platform) { // The code to add a custom paper size is different for Windows NT then it is // for previous versions of windows structPrinterDefaults defaults = InitPrinterDefaults(); IntPtr hPrinter = IntPtr.Zero; // Open the printer. if (OpenPrinter(printerName, out hPrinter, ref defaults)) { try { // delete the form incase it already exists DeleteForm(hPrinter, paperName); // create and initialize the FORM_INFO_1 structure FormInfo1 formInfo = new FormInfo1(); formInfo.Flags = 0; formInfo.pName = paperName; // all sizes in 1000ths of millimeters formInfo.Size.width = (int)(width * 100.0); formInfo.Size.height = (int)(height * 100.0); formInfo.ImageableArea.left = 0; formInfo.ImageableArea.right = formInfo.Size.width; formInfo.ImageableArea.top = 0; formInfo.ImageableArea.bottom = formInfo.Size.height; if (!AddForm(hPrinter, 1, ref formInfo)) { StringBuilder strBuilder = new StringBuilder(); strBuilder.AppendFormat( "Failed to add the custom paper size {0} to the printer {1}, System error number: {2}", paperName, printerName, GetLastError()); throw new ApplicationException(strBuilder.ToString()); } else { SetForm(hPrinter, paperName, 1, ref formInfo); } SetPrinterDevMode(hPrinter, printerName, paperName); } finally { ClosePrinter(hPrinter); } } else { StringBuilder strBuilder = new StringBuilder(); strBuilder.AppendFormat("Failed to open the {0} printer, System error number: {1}", printerName, GetLastError()); throw new ApplicationException(strBuilder.ToString()); } } else { structDevMode pDevMode = new structDevMode(); IntPtr hDC = CreateDC(null, printerName, null, ref pDevMode); if (hDC != IntPtr.Zero) { const long DM_PAPERSIZE = 0x00000002L; const long DM_PAPERLENGTH = 0x00000004L; const long DM_PAPERWIDTH = 0x00000008L; pDevMode.dmFields = (int)(DM_PAPERSIZE | DM_PAPERWIDTH | DM_PAPERLENGTH); pDevMode.dmPaperSize = 256; pDevMode.dmPaperWidth = (short)(width * 1000.0); pDevMode.dmPaperLength = (short)(height * 1000.0); ResetDC(hDC, ref pDevMode); DeleteDC(hDC); } } } const int DM_OUT_BUFFER = 2; const int DM_IN_BUFFER = 8; private void SetPrinterDevMode(IntPtr hPrinter, string printerName, string paperName) { // INIT structDevMode devMode = new structDevMode(); PRINTER_INFO_9 printerInfo = new PRINTER_INFO_9(); printerInfo.pDevMode = IntPtr.Zero; IntPtr hDevMode = GetDevMode(hPrinter, printerName, ref devMode); // SET THE FORM NAME FIELDS TO INDICATE THAT THIS FIELD WILL BE MODIFIED devMode.dmFields = 0x10000; // DM_FORMNAME // SET THE FORM NAME devMode.dmFormName = paperName; ChangeDevMode(hPrinter, printerName, paperName, devMode, hDevMode, ref printerInfo); IntPtr hPrinterInfo = GetPrinterInfo(hPrinter); // FILL THE PRINTER INFO STRUCTURE printerInfo = (PRINTER_INFO_9)Marshal.PtrToStructure(hPrinterInfo, printerInfo.GetType()); printerInfo.pDevMode = hDevMode; // GET A POINTER TO THE PRINTER INFO STRUCTURE Marshal.StructureToPtr(printerInfo, hPrinterInfo, true); // SET THE PRINTER SETTINGS bool bSuccess = SetPrinter(hPrinter, 9, hPrinterInfo, 0); if (!bSuccess) throw new Exception("Set printer failed!"); } private static IntPtr GetPrinterInfo(IntPtr hPrinter) { IntPtr hPrinterInfo; bool bSuccess = false; int iPrinterInfoSize, iDummyInt; // GET THE PRINTER INFO SIZE GetPrinter(hPrinter, 9, IntPtr.Zero, 0, out iPrinterInfoSize); if (iPrinterInfoSize == 0) throw new ApplicationException( "GetPrinter failed. Couldn't get the # bytes needed for shared PRINTER_INFO_9 structure"); // ALLOCATE THE BUFFER hPrinterInfo = Marshal.AllocCoTaskMem(iPrinterInfoSize + 100); // GET A POINTER TO THE PRINTER INFO BUFFER bSuccess = GetPrinter(hPrinter, 9, hPrinterInfo, iPrinterInfoSize, out iDummyInt); if (!bSuccess) throw new ApplicationException( "GetPrinter failed. Couldn't get the shared PRINTER_INFO_9 structure"); return hPrinterInfo; } private static void ChangeDevMode(IntPtr hPrinter, string printerName, string paperName, structDevMode devMode, IntPtr hDevMode, ref PRINTER_INFO_9 printerInfo) { // PUT THE DEV_MODE STRUCTURE BACK INTO THE POINTER Marshal.StructureToPtr(devMode, hDevMode, true); // MERGE THE NEW CHAGES WITH THE OLD int iRet = DocumentProperties(IntPtr.Zero, hPrinter, printerName, printerInfo.pDevMode, printerInfo.pDevMode, DM_IN_BUFFER | DM_OUT_BUFFER); if (iRet < 0) throw new ApplicationException("Unable to set the orientation setting for this printer."); } private static IntPtr GetDevMode(IntPtr hPrinter, string printerName, ref structDevMode devMode) { // GET THE SIZE OF THE DEV_MODE BUFFER int iDevModeSize = DocumentProperties(IntPtr.Zero, hPrinter, printerName, IntPtr.Zero, IntPtr.Zero, 0); if (iDevModeSize < 0) throw new ApplicationException("Cannot get the size of the DEVMODE structure."); // ALLOCATE THE BUFFER IntPtr hDevMode = Marshal.AllocCoTaskMem(iDevModeSize + 100); // GET A POINTER TO THE DEV_MODE BUFFER int iRet = DocumentProperties(IntPtr.Zero, hPrinter, printerName, hDevMode, IntPtr.Zero, DM_OUT_BUFFER); if (iRet < 0) throw new ApplicationException("Cannot get the DEVMODE structure."); // FILL THE DEV_MODE STRUCTURE devMode = (structDevMode)Marshal.PtrToStructure(hDevMode, devMode.GetType()); return hDevMode; } private static structPrinterDefaults InitPrinterDefaults() { const int PRINTER_ACCESS_USE = 0x00000008; const int PRINTER_ACCESS_ADMINISTER = 0x00000004; structPrinterDefaults defaults = new structPrinterDefaults(); defaults.pDatatype = null; defaults.pDevMode = IntPtr.Zero; defaults.DesiredAccess = PRINTER_ACCESS_ADMINISTER | PRINTER_ACCESS_USE; return defaults; } #region Win API [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct structPrinterDefaults { [MarshalAs(UnmanagedType.LPTStr)] public String pDatatype; public IntPtr pDevMode; [MarshalAs(UnmanagedType.I4)] public int DesiredAccess; }; [DllImport("winspool.Drv", EntryPoint = "OpenPrinter", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool OpenPrinter([MarshalAs(UnmanagedType.LPTStr)] string printerName, out IntPtr phPrinter, ref structPrinterDefaults pd); [DllImport("winspool.Drv", EntryPoint = "ClosePrinter", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool ClosePrinter(IntPtr phPrinter); [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct structSize { public Int32 width; public Int32 height; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct structRect { public Int32 left; public Int32 top; public Int32 right; public Int32 bottom; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct FormInfo1 { [MarshalAs(UnmanagedType.I4)] public int Flags; [MarshalAs(UnmanagedType.LPTStr)] public String pName; public structSize Size; public structRect ImageableArea; }; [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi /* changed from CharSet=CharSet.Auto */)] internal struct structDevMode { [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public String dmDeviceName; [MarshalAs(UnmanagedType.U2)] public short dmSpecVersion; [MarshalAs(UnmanagedType.U2)] public short dmDriverVersion; [MarshalAs(UnmanagedType.U2)] public short dmSize; [MarshalAs(UnmanagedType.U2)] public short dmDriverExtra; [MarshalAs(UnmanagedType.U4)] public int dmFields; [MarshalAs(UnmanagedType.I2)] public short dmOrientation; [MarshalAs(UnmanagedType.I2)] public short dmPaperSize; [MarshalAs(UnmanagedType.I2)] public short dmPaperLength; [MarshalAs(UnmanagedType.I2)] public short dmPaperWidth; [MarshalAs(UnmanagedType.I2)] public short dmScale; [MarshalAs(UnmanagedType.I2)] public short dmCopies; [MarshalAs(UnmanagedType.I2)] public short dmDefaultSource; [MarshalAs(UnmanagedType.I2)] public short dmPrintQuality; [MarshalAs(UnmanagedType.I2)] public short dmColor; [MarshalAs(UnmanagedType.I2)] public short dmDuplex; [MarshalAs(UnmanagedType.I2)] public short dmYResolution; [MarshalAs(UnmanagedType.I2)] public short dmTTOption; [MarshalAs(UnmanagedType.I2)] public short dmCollate; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public String dmFormName; [MarshalAs(UnmanagedType.U2)] public short dmLogPixels; [MarshalAs(UnmanagedType.U4)] public int dmBitsPerPel; [MarshalAs(UnmanagedType.U4)] public int dmPelsWidth; [MarshalAs(UnmanagedType.U4)] public int dmPelsHeight; [MarshalAs(UnmanagedType.U4)] public int dmNup; [MarshalAs(UnmanagedType.U4)] public int dmDisplayFrequency; [MarshalAs(UnmanagedType.U4)] public int dmICMMethod; [MarshalAs(UnmanagedType.U4)] public int dmICMIntent; [MarshalAs(UnmanagedType.U4)] public int dmMediaType; [MarshalAs(UnmanagedType.U4)] public int dmDitherType; [MarshalAs(UnmanagedType.U4)] public int dmReserved1; [MarshalAs(UnmanagedType.U4)] public int dmReserved2; } [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)] internal struct PRINTER_INFO_9 { public IntPtr pDevMode; } [DllImport("winspool.Drv", EntryPoint = "AddFormW", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool AddForm( IntPtr phPrinter, [MarshalAs(UnmanagedType.I4)] int level, ref FormInfo1 form); [DllImport("winspool.Drv", EntryPoint = "SetForm", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool SetForm(IntPtr phPrinter, string paperName, [MarshalAs(UnmanagedType.I4)] int level, ref FormInfo1 form); [DllImport("winspool.Drv", EntryPoint = "DeleteForm", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool DeleteForm( IntPtr phPrinter, [MarshalAs(UnmanagedType.LPTStr)] string pName); [DllImport("kernel32.dll", EntryPoint = "GetLastError", SetLastError = false, ExactSpelling = true, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern Int32 GetLastError(); [DllImport("GDI32.dll", EntryPoint = "CreateDC", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern IntPtr CreateDC([MarshalAs(UnmanagedType.LPTStr)] string pDrive, [MarshalAs(UnmanagedType.LPTStr)] string pName, [MarshalAs(UnmanagedType.LPTStr)] string pOutput, ref structDevMode pDevMode); [DllImport("GDI32.dll", EntryPoint = "ResetDC", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern IntPtr ResetDC( IntPtr hDC, ref structDevMode pDevMode); [DllImport("GDI32.dll", EntryPoint = "DeleteDC", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = false, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool DeleteDC(IntPtr hDC); [DllImport("winspool.Drv", EntryPoint = "SetPrinterA", SetLastError = true, CharSet = CharSet.Auto, ExactSpelling = true, CallingConvention = CallingConvention.StdCall), SuppressUnmanagedCodeSecurityAttribute()] internal static extern bool SetPrinter( IntPtr hPrinter, [MarshalAs(UnmanagedType.I4)] int level, IntPtr pPrinter, [MarshalAs(UnmanagedType.I4)] int command); /* LONG DocumentProperties( HWND hWnd, // handle to parent window HANDLE hPrinter, // handle to printer object LPTSTR pDeviceName, // device name PDEVMODE pDevModeOutput, // modified device mode PDEVMODE pDevModeInput, // original device mode DWORD fMode // mode options ); */ [DllImport("winspool.Drv", EntryPoint = "DocumentPropertiesA", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern int DocumentProperties( IntPtr hwnd, IntPtr hPrinter, [MarshalAs(UnmanagedType.LPStr)] string pDeviceName /* changed from String to string */, IntPtr pDevModeOutput, IntPtr pDevModeInput, int fMode ); [DllImport("winspool.Drv", EntryPoint = "GetPrinterA", SetLastError = true, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] public static extern bool GetPrinter( IntPtr hPrinter, int dwLevel /* changed type from Int32 */, IntPtr pPrinter, int dwBuf /* chagned from Int32*/, out int dwNeeded /* changed from Int32*/ ); // SendMessageTimeout tools [Flags] public enum SendMessageTimeoutFlags : uint { SMTO_NORMAL = 0x0000, SMTO_BLOCK = 0x0001, SMTO_ABORTIFHUNG = 0x0002, SMTO_NOTIMEOUTIFNOTHUNG = 0x0008 } private const int WM_SETTINGCHANGE = 0x001A; private const int HWND_BROADCAST = 0xffff; [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] public static extern IntPtr SendMessageTimeout( IntPtr windowHandle, uint Msg, IntPtr wParam, IntPtr lParam, SendMessageTimeoutFlags flags, uint timeout, out IntPtr result ); #endregion } 

Answer 4

I just used the same code to add custom paper size to our custom Windows printer driver. It seems that sometimes this does not work, but the reason is the GPD file of the printer driver. If the special CUSTOMIZE section does not exist in this file, this printer will never accept ANY QUALITY paper size. You can easily check using the standard Windows procedure to add custom paper to any printer.

 *Option: CUSTOMSIZE { *rcNameID: =USER_DEFINED_SIZE_DISPLAY *MinSize: PAIR(100, 100) *MaxSize: PAIR(4026, 11340) *TopMargin: 0 *BottomMargin: 0 *MaxPrintableWidth: 4026 *MinLeftMargin: 0 *CenterPrintable?: FALSE *Command: CmdSelect { *Order: DOC_SETUP.10 *Cmd: "" } }