korwin 2002-01-15 05:00
This may not be the correct forum, but it seems like the best spot I have found so far to post this question. I want to programatically switch display number 2 to be the primary display and also change the screen resolution temporarily to 640x480. This is what I am doing (I have VC5 and W2k):
DEVMODE devicemode;
devicemode.dmSize = sizeof(devicemode);
EnumDisplaySettings("\\\\.\\Display2", 0, &devicemode);
devicemode.dmPelsWidth = 640;
devicemode.dmPelsHeight = 480;
devicemode.dmFields = DM_PELSWIDTH | DM_PELSHEIGHT;
ChangeDisplaySettingsEx("\\\\.\\Display2", &devicemode, NULL, CDS_SET_PRIMARY, NULL);
The problem is that although the screen resolution correctly changes to 640x480 I can not get my secondary display to become my primary display.
Anyone know if I am doing something wrong? Any ideas or hints? I am not even positive that my runtime library supports setting the primary display but the constants are in winuser.h so I assumed they were supported. Does anyone know what system .dll I need to support this?
thanks a lot,
korwin
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