GSPRNTR.DLL provides two functions to control printer page orientation:

  GsSetPageOrientation ( Hwnd , OrientationMode )
    	Orientation mode = 1 = Portrait
			   2 = Landscape

  GsGetPageOrientation ( Hwnd )

Both funtions return the currently selected orientation mode

From Visual Basic declare the functions as :

Declare Function GsGetPageOrientation Lib "gsprntr.dll" 
                  (ByVal Hwnd As Integer) As Integer
Declare Function GsSetPageOrientation Lib "gsprntr.dll" 
                  (ByVal Hwnd As Integer, ByVal Mode As Integer) As Integer

From C declare the functions as :

int FAR PASCAL GsGetPageOrientation ( HWND iHwnd ) ;
int FAR PASCAL GsSetPageOrientation ( HWND iHwnd , int iMode ) ;


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GSPRNTR.DLL is a shareware DLL for Windows 3.0 use. It may be freely
distributed with your application once it has been registered. To
register GSPRNTR.DLL send monies in the appropriate currency to the
address below.

Inside United Kingdom - œ35.00

Outside United Kingdom - $50.00

Geoff Hopkins
6 School Road
Upper Beeding
Steyning
West Sussex
BN44 3HY
ENGLAND

Compuserve ID 100064,3722