The followong code change the default printer. It works only on Windows95.

Declare

Public Const CCHDEVICENAME = 32
Public Const CCHFORMNAME = 32
Public Const PRINTER_ATTRIBUTE_DEFAULT = &H4



Type PRINTER_INFO_5
pPrinterName As String
pPortName As String
Attributes As Long
DeviceNotSelectedTimeout As Long
TransmissionRetryTimeout As Long
End Type



Type DEVMODE
dmDeviceName As String * CCHDEVICENAME
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 * CCHFORMNAME
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type



Type PRINTER_DEFAULTS
pDatatype As String
pDevMode As DEVMODE
DesiredAccess As Long
End Type



Declare Function SetPrinter Lib "winspool.drv" Alias "SetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, pPrinter As PRINTER_INFO_5, ByVal Command As Long) As Long

Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) As Long

Code

Public Function SetDefaultPrinter(PrinterName As String) As Boolean

Dim phPrinter As Long
Dim pDefault As PRINTER_DEFAULTS
Dim pInfo5 As PRINTER_INFO_5
Dim Ret As Long

Ret = OpenPrinter(PrinterName, phPrinter, pDefault)

If phPrinter <> 0 Then

pInfo5.pPrinterName = PrinterName

pInfo5.Attributes = PRINTER_ATTRIBUTE_DEFAULT

Ret = SetPrinter(phPrinter, 5, pInfo5, 0)

If Ret <> 0 Then

SetDefaultPrinter = True

Else

SetDefaultPrinter = False

End If

Else

SetDefaultPrinter = False

End If

End Function