Modifier l'orientation d'impression avec l'API winspool.drv

Bonjour,


Je souhaite modifier l'orientation de l'impression (portrait, paysage) d'une application à l'aide d'un OCX VB. J'ai donc récupéré et adapté le code ci-dessous qui est censé agir sur l'orientation de l'imprimante par défaut.
Cette dernière est correctement modifiée dans le pilote de l'imprimante (panneau de configuration, option d'impression de l'imprimante par défaut) mais rien n'est changé dans les propriétés d'impressions de mon document. Dans le cas présent j'ai fait le test avec le bloc notes de windows. Même cas de figure avec n'importe quelle fenêtre windows permettant de lancer des impressions.

En vous remerciant de l'aide que vous pourrez m'apporter


Private Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) As Long
Private Declare Function SetPrinter Lib "winspool.drv" Alias "SetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, pPrinter As Any, ByVal Command As Long) As Long
Private Declare Function GetPrinter Lib "winspool.drv" Alias "GetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, pPrinter As Any, ByVal cbBuf As Long, pcbNeeded As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long

'The following is an unusual declaration of DocumentProperties:
' pDevModeOutput and pDevModeInput are usually declared ByRef. They are declared
' ByVal in this program because we're using a Printer_Info_2 structure.
' The pi2 structure contains a variable of type LONG which contains the address
' of the DevMode structure (this is called a pointer). This LONG variable must
' be passed ByVal.
' Normally this function is called with a BYTE ARRAY which contains the DevMode
' structure and the Byte Array is passed ByRef.
Private Declare Function DocumentProperties Lib "winspool.drv" Alias "DocumentPropertiesA" (ByVal hwnd As Long, ByVal hPrinter As Long, ByVal pDeviceName As String, ByVal pDevModeOutput As Any, ByVal pDevModeInput As Any, ByVal fMode As Long) As Long

Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Integer

'------CODE

Public Sub SetOrientation(ByVal chng As Integer)

Dim PrinterHandle As Long
Dim PrinterName As String
Dim pd As PRINTER_DEFAULTS
Dim MyDevMode As DEVMODE
Dim Result As Long
Dim Needed As Long
Dim pFullDevMode As Long
Dim pi2_buffer() As Long 'This is a block of memory for the Printer_Info_2 structure
'If you need to use the Printer_Info_2 User Defined Type, the
' definition of Printer_Info_2 in the API viewer is incorrect.
' pDevMode and pSecurityDescriptor should be defined As Long.

PrinterName = Printer.DeviceName
If PrinterName = "" Then
Exit Sub
End If

pd.pDatatype = vbNullString
pd.pDevMode = 0&
'Printer_Access_All is required for NT security
pd.DesiredAccess = PRINTER_ALL_ACCESS

Result = OpenPrinter(PrinterName, PrinterHandle, pd)

'The first call to GetPrinter gets the size, in bytes, of the buffer needed.
'This value is divided by 4 since each element of pi2_buffer is a long.
Result = GetPrinter(PrinterHandle, 2, ByVal 0&, 0, Needed)
ReDim pi2_buffer((Needed \ 4))
Result = GetPrinter(PrinterHandle, 2, pi2_buffer(0), Needed, Needed)

'The seventh element of pi2_buffer is a Pointer to a block of memory
' which contains the full DevMode (including the PRIVATE portion).
pFullDevMode = pi2_buffer(7)

'Copy the Public portion of FullDevMode into our DevMode structure
Call CopyMemory(MyDevMode, ByVal pFullDevMode, Len(MyDevMode))

'Make desired changes
MyDevMode.dmFields = DM_ORIENTATION
MyDevMode.dmOrientation = chng

'Copy our DevMode structure back into FullDevMode
Call CopyMemory(ByVal pFullDevMode, MyDevMode, Len(MyDevMode))

'Copy our changes to "the PUBLIC portion of the DevMode" into "the PRIVATE portion of the DevMode"
Dim hwnd As Integer
hwnd = FindWindow(vbNullString, "Sans titre - Bloc-notes")
Result = DocumentProperties(hwnd, PrinterHandle, PrinterName, ByVal pFullDevMode, ByVal pFullDevMode, DM_IN_BUFFER Or DM_OUT_BUFFER)

'Update the printer's default properties (to verify, go to the Printer folder
' and check the properties for the printer)
Result = SetPrinter(PrinterHandle, 2, pi2_buffer(0), 0&)

Call ClosePrinter(PrinterHandle)

'Note: Once "Set Printer = " is executed, anywhere in the code, after that point
' changes made with SetPrinter will ONLY affect the system-wide printer --
' -- the changes will NOT affect the VB printer object.
' Therefore, it may be necessary to reset the printer object's parameters to
' those chosen in the devmode.
Dim p As Printer
For Each p In Printers
If p.DeviceName = PrinterName Then
Set Printer = p
Exit For
End If
Next p
Printer.Orientation = MyDevMode.dmOrientation

End Sub