'將打印設置為橫向打印:ChngPrinterOrientationLandscape Me
'將打印設置為縱向打印:ChngPrinterOrientationPortrait Me
'將下面的文件存為.BAS文件，在打印窗體加載的時候按上面的方法調用即可
'Constants used in the DevMode structure
Private Const CCHDEVICENAME = 32
Private Const CCHFORMNAME = 32
'Constants for NT security
Private Const STANDARD_RIGHTS_REQUIRED = &HF0000
Private Const PRINTER_ACCESS_ADMINISTER = &H4
Private Const PRINTER_ACCESS_USE = &H8
Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or PRINTER_ACCESS_ADMINISTER Or
PRINTER_ACCESS_USE)
'Constants used to make changes to the values contained in the DevMode
Private Const DM_MODIFY = 8
Private Const DM_IN_BUFFER = DM_MODIFY
Private Const DM_COPY = 2
Private Const DM_OUT_BUFFER = DM_COPY
Private Const DM_DUPLEX = &H1000&
Private Const DMDUP_SIMPLEX = 1
Private Const DMDUP_VERTICAL = 2
Private Const DMDUP_HORIZONTAL = 3
Private Const DM_ORIENTATION = &H1&
Private PageDirection As Integer
'------USER DEFINED TYPES
'The DevMode structure contains printing parameters.
'Note that this only redivsents the PUBLIC portion of the DevMode.
' The full DevMode also contains a variable length PRIVATE section
' which varies in length and content between printer drivers.
'NEVER use this User Defined Type directly with any API call.
' Always combine it into a FULL DevMode structure and then send the
' full DevMode to the API call.
Private 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
dmLogPixels As Integer
dmBitsPerPel As Long
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
dmICMMethod As Long ' // Windows 95 only
dmICMIntent As Long ' // Windows 95 only
dmMediaType As Long ' // Windows 95 only
dmDitherType As Long ' // Windows 95 only
dmReserved1 As Long ' // Windows 95 only
dmReserved2 As Long ' // Windows 95 only
End Type
Private Type PRINTER_DEFAULTS
'Note:
' The definition of Printer_Defaults in the VB5 API viewer is
incorrect.
' Below, pDevMode has been corrected to LONG.
pDatatype As String
pDevMode As Long
DesiredAccess As Long
End Type
'------DECLARATIONS
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 Sub SetOrientation(NewSetting As Long, chng As Integer, ByVal frm As Form)
Dim PrinterHandle As Long
Dim PrinterName As String
Dim pd As PRINTER_DEFAULTS
