Utilizzare la funzione PrintSpoolerAPI SetForm() in C#

Question

Sto lavorando a un'applicazione Windows Form in cui voglio stampare un documento personalizzato. Questo documento personalizzato è di dimensioni personalizzate e devo impostare le dimensioni predefinite della pagina di stampa usando il codice C#.

Ho fatto qualche ricerca su google e ho trovato PrintSpoolerAPI. Il codice che ho trovato aggiungerà un modulo/pagina personalizzato utilizzando il metodo AddForm() all'elenco delle pagine disponibili per la stampa. Voglio anche impostare questa pagina appena aggiunta come pagina di stampa predefinita.

ho provato a scrivere questa riga nel codice

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

Esso restituisce un valore true, ma la sua non è l'impostazione della pagina di stampa predefinito.

dmPaperSize svolge alcun ruolo in questo?

Ecco il codice completo:

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); 
      } 
     } 
    } 
} 

}

va aiutato a risolvere questo problema.

Answer 1

Il codice è quasi perfetta (necessita di lavori in modalità a 64 bit) e fa quello che intende fare:

Ecco invece dove finisce la buona notizia. L'api si utilizza dialoghi direttamente al driver della stampante ed è responsabile di garantire che le modifiche DEVMODE diventino effettive. Funziona bene per il driver della stampante XPS, non adatto per molti altri tipi di driver. Come il driver Hewlett Packard che ho provato anche io.

Tutto ciò che fai ha un effetto collaterale immediatamente visibile nel registro. Puoi vederlo con Regedit.exe. Quale è un buon modo per ricontrollare il tuo codice. E per vedere che è necessario smettere di provare perché il driver della stampante non collaborerà. I tasti si vogliono guardare:

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Forms. Questa chiave elenca il modulo che aggiungi. Non dovresti avere problemi con quello.

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Forms \ MJM 80mm * Lunghezza ricevuta, valore "FormKeyword". Scrivilo, questa è la "parola chiave" con la quale il tuo modulo viene selezionato dalla stampante.

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Printers \ printername, valore "Default DevMode". Questo è scritto quando si chiama SetPrinter(). Puoi guardare il dump esadecimale del valore. Il FormKeyword annotato nel passaggio precedente è visibile all'offset 0x348

• HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Control \ Print \ Printers \ printername \ DsDriver, printMedia Valore supportato. Non del tutto sicuro di questo, ma dovrebbe mostrare un elenco di formati di carta e il modulo personalizzato dovrebbe essere visibile lì.

Siamo spiacenti per la brutta notizia, le stampanti fanno schifo.

Answer 2

per x64 utilizzano

[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

Grazie al codice di Nilesh e informazioni registro Hans', la mia richiesta è l'impostazione della pagesize predefinito per stampante specifica da C# programma, quindi aperta del browser web per stampare una pagina web specifica.

A questo punto ho provato ad aggiungere il mio modulo di pagina personalizzato e impostare dmFormName con esso come predefinito. Poi ho recuperato la struttura di devmode, il dmFormName è ciò che ho modificato, ma quando apro il blocco note o un'altra applicazione e provo a stampare qualcosa, vedo che il pageize predefinito non è quello che ho impostato.

Inoltre, ho provato a eliminare tutti i pageizes inutilizzati in modo che ce ne fosse uno solo come predefinito, ma solo quello aggiunto da me stesso può essere eliminato.

PS: Sono uno refactoring del codice come segue:

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

ho appena usato un codice simile per aggiungere un formato carta speciale per il driver nostra stampante finestre personalizzate. Sembra che a volte non funzioni, ma il motivo è il file GPD del driver della stampante. Se in questo file non esiste la sezione speciale PERSONALIZZA che la stampante non accetterà mai QUALSIASI formato carta CUSTOM. È possibile controllare facilmente utilizzando la procedura standard di Windows per aggiungere carta personalizzata a qualsiasi stampante.

*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: "" 
    } 
}