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How to set duplex printing for Microsoft Word Automation clients

Microsoft Word Automation clients cannot set the duplex print flag before a print job starts in Microsoft Office Word 2003 or in Microsoft Office Word 2007. Although a parameter in the PrintOut method indicates that there is support for duplex printing, the parameter does not provide true duplex printing. Also, this parameter may not be available to you, based on your operating system or on your installed language. However, to work around this limitation on Microsoft Windows systems, you must change the duplex flag for the active printer driver before the PrintOut function is called in Word.

This article describes how to use the Microsoft Windows API to change the duplex setting of the active printer to permit a Word document to print in duplex.

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Add a local print driver for a network printer in Microsoft Windows 2000

The print driver does not reside on the local computer. The print driver resides on the print server. For Microsoft Windows 2000 users who must print to a shared network printer, this may be a problem. Although a security administrator can configure the print server to permit end users to change global settings, Microsoft does not typically recommend this action. To work around this problem, you can install a local print driver for the network printer. Then, you can let each of your users control the settings for their local systems. To do this, follow these steps:
  1. Click Start, click Settings, click Printers, and then double-click Add Printer.

    The Add Printer Wizard starts.

    Click Next.
  2. Click Local printer, and then click Next.
  3. Click Create a new port, and then click Local Port in the Port Type section.
  4. In the Port Name box, type the location of the printer on the network.

    For example, type \\printserver\printername.

    Note Use the exact path name to the printer.
  5. Click Next, and then select a Windows 2000 driver for your printer.
  6. Click Next, and then follow the instructions to finish the wizard.
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Build the sample

If you change the printer properties for the active printer, all the applications that use the active printer are affected, not just Word. If you must change the settings for a particular print job, restore the settings when the print job is complete.

The following code uses the DocumentProperties API to change the print settings of the printer driver to enable duplex printing. For this code to work successfully, the end user must have the correct permissions to change the global print settings for the printer. If the end user does not have the correct permissions to change the driver settings, the end user receives an "Access Denied" error message on the OpenPrinter API call.
  1. Start Microsoft Visual Basic 6.0. Create a new project.

    By default, Form1 is created.
  2. Add a standard .bas module to the project. Add the following code example to the code window of the module.
    Option Explicit   Public Type PRINTER_DEFAULTS       pDatatype As Long       pDevmode As Long       DesiredAccess As Long   End Type   Public Type PRINTER_INFO_2       pServerName As Long       pPrinterName As Long       pShareName As Long       pPortName As Long       pDriverName As Long       pComment As Long       pLocation As Long       pDevmode As Long       ' Pointer to DEVMODE       pSepFile As Long       pPrintProcessor As Long       pDatatype As Long       pParameters As Long       pSecurityDescriptor As Long  ' Pointer to SECURITY_DESCRIPTOR       Attributes As Long       Priority As Long       DefaultPriority As Long       StartTime As Long       UntilTime As Long       Status As Long       cJobs As Long       AveragePPM As Long   End Type   Public Type DEVMODE       dmDeviceName As String * 32       dmSpecVersion As Integer       dmDriverVersion As Integer       dmSize As Integer       dmDriverExtra As Integer       dmFields As Long       dmOrientation As Integer       dmPaperSize As Integer       dmPaperLength As Integer       dmPaperWidth As Integer       dmScale As Integer       dmCopies As Integer       dmDefaultSource As Integer       dmPrintQuality As Integer       dmColor As Integer       dmDuplex As Integer       dmYResolution As Integer       dmTTOption As Integer       dmCollate As Integer       dmFormName As String * 32       dmUnusedPadding As Integer       dmBitsPerPel As Integer       dmPelsWidth As Long       dmPelsHeight As Long       dmDisplayFlags As Long       dmDisplayFrequency As Long       dmICMMethod As Long       dmICMIntent As Long       dmMediaType As Long       dmDitherType As Long       dmReserved1 As Long       dmReserved2 As Long   End Type   Public Const DM_DUPLEX = &H1000&   Public Const DM_IN_BUFFER = 8   Public Const DM_OUT_BUFFER = 2   Public Const PRINTER_ACCESS_ADMINISTER = &H4   Public Const PRINTER_ACCESS_USE = &H8   Public Const STANDARD_RIGHTS_REQUIRED = &HF0000   Public Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or _             PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE)   Public Declare Function ClosePrinter Lib "winspool.drv" _    (ByVal hPrinter As Long) As Long   Public Declare Function DocumentProperties Lib "winspool.drv" _     Alias "DocumentPropertiesA" (ByVal hwnd As Long, _     ByVal hPrinter As Long, ByVal pDeviceName As String, _     ByVal pDevModeOutput As Long, ByVal pDevModeInput As Long, _     ByVal fMode As Long) As Long   Public Declare Function GetPrinter Lib "winspool.drv" Alias _     "GetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, _     pPrinter As Byte, ByVal cbBuf As Long, pcbNeeded As Long) As Long   Public Declare Function OpenPrinter Lib "winspool.drv" Alias _     "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, _     pDefault As PRINTER_DEFAULTS) As Long   Public Declare Function SetPrinter Lib "winspool.drv" Alias _     "SetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, _     pPrinter As Byte, ByVal Command As Long) As Long   Public Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" _    (pDest As Any, pSource As Any, ByVal cbLength As Long)    ' ==================================================================   ' SetPrinterDuplex.   '   '  Programmatically set the Duplex flag for the specified default properties   '  of the printer driver.   '   '  Returns: True on success and False on error. An error also   '  displays a message box. This message box is displayed for information   '  only. You must modify the code to support better error   '  handling in your production application.   '   '  Parameters:   '    sPrinterName - The name of the printer to be used.   '   '    nDuplexSetting - One of the following standard settings:   '       1 = None   '       2 = Duplex on long edge (book)   '       3 = Duplex on short edge (legal)   '   ' ==================================================================   Public Function SetPrinterDuplex(ByVal sPrinterName As String, _   ByVal nDuplexSetting As Long) As Boolean      Dim hPrinter As Long      Dim pd As PRINTER_DEFAULTS      Dim pinfo As PRINTER_INFO_2      Dim dm As DEVMODE         Dim yDevModeData() As Byte      Dim yPInfoMemory() As Byte      Dim nBytesNeeded As Long      Dim nRet As Long, nJunk As Long         On Error GoTo cleanup         If (nDuplexSetting < 1) Or (nDuplexSetting > 3) Then         MsgBox "Error: dwDuplexSetting is incorrect."         Exit Function      End If            pd.DesiredAccess = PRINTER_ALL_ACCESS      nRet = OpenPrinter(sPrinterName, hPrinter, pd)      If (nRet = 0) Or (hPrinter = 0) Then         If Err.LastDllError = 5 Then            MsgBox "Access denied -- See the article for more info."         Else            MsgBox "Cannot open the printer specified " & _              "(make sure the printer name is correct)."         End If         Exit Function      End If         nRet = DocumentProperties(0, hPrinter, sPrinterName, 0, 0, 0)      If (nRet < 0) Then         MsgBox "Cannot get the size of the DEVMODE structure."         GoTo cleanup      End If         ReDim yDevModeData(nRet + 100) As Byte      nRet = DocumentProperties(0, hPrinter, sPrinterName, _                  VarPtr(yDevModeData(0)), 0, DM_OUT_BUFFER)      If (nRet < 0) Then         MsgBox "Cannot get the DEVMODE structure."         GoTo cleanup      End If         Call CopyMemory(dm, yDevModeData(0), Len(dm))         If Not CBool(dm.dmFields And DM_DUPLEX) Then        MsgBox "You cannot modify the duplex flag for this printer " & _               "because it does not support duplex or the driver " & _               "does not support setting it from the Windows API."         GoTo cleanup      End If         dm.dmDuplex = nDuplexSetting      Call CopyMemory(yDevModeData(0), dm, Len(dm))         nRet = DocumentProperties(0, hPrinter, sPrinterName, _        VarPtr(yDevModeData(0)), VarPtr(yDevModeData(0)), _        DM_IN_BUFFER Or DM_OUT_BUFFER)      If (nRet < 0) Then        MsgBox "Unable to set duplex setting to this printer."        GoTo cleanup      End If         Call GetPrinter(hPrinter, 2, 0, 0, nBytesNeeded)      If (nBytesNeeded = 0) Then GoTo cleanup         ReDim yPInfoMemory(nBytesNeeded + 100) As Byte      nRet = GetPrinter(hPrinter, 2, yPInfoMemory(0), nBytesNeeded, nJunk)      If (nRet = 0) Then         MsgBox "Unable to get shared printer settings."         GoTo cleanup      End If         Call CopyMemory(pinfo, yPInfoMemory(0), Len(pinfo))      pinfo.pDevmode = VarPtr(yDevModeData(0))      pinfo.pSecurityDescriptor = 0      Call CopyMemory(yPInfoMemory(0), pinfo, Len(pinfo))         nRet = SetPrinter(hPrinter, 2, yPInfoMemory(0), 0)      If (nRet = 0) Then         MsgBox "Unable to set shared printer settings."      End If         SetPrinterDuplex = CBool(nRet)cleanup:      If (hPrinter <> 0) Then Call ClosePrinter(hPrinter)   End Function
  3. Add a standard Command Button control to Form1.
  4. Add the following code example to the code window for Form1.
             Option Explicit   Private Sub Command1_Click()      Dim oWord As Object      Dim oDoc As Object            Set oWord = CreateObject("Word.application")      oWord.Visible = True            Set oDoc = oWord.Documents.Add      oDoc.Range.Select            oWord.Selection.TypeText "This is on page 1" & vbCr      oWord.Selection.InsertBreak 1      oWord.Selection.TypeText "This is page 2"            SetPrinterDuplex Printer.DeviceName, 2            oDoc.PrintOut Background:=False            SetPrinterDuplex Printer.DeviceName, 1            MsgBox "Print Done", vbMsgBoxSetForeground            oDoc.Saved = True      oDoc.Close      Set oDoc = Nothing         oWord.Quit      Set oWord = Nothing   End Sub						
  5. Run the sample.

    If your printer supports duplex printing, the test document prints on both sides of the page.
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For more information about problems that may occur while you try to print Word documents by using a duplex printer, click the following article numbers to view the articles in the Microsoft Knowledge Base:
176189 Shading of solid black or gray won't print duplex on NT
196857 First page prints on back of last page with duplex
214683 Duplex printing does not work with objects on page
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WD2003 WD2007

Article ID: 828638 - Last Review: 05/14/2007 18:32:20 - Revision: 4.2

Microsoft Office Word 2007, Microsoft Office Word 2003, Microsoft Visual Basic 5.0 Professional Edition, Microsoft Visual Basic 6.0 Professional Edition, Microsoft Visual Basic 5.0 Enterprise Edition, Microsoft Visual Basic Enterprise Edition for Windows 6.0

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