uman

for some reason, the return value of GetSystemMetrics with CM_XSCREEN is only 1280 when I'm running two monitors at 1280x1024 each. Shouldn't it return 2560? If not, what can I do to get the total display size? I know I can just multiply the value by two, but what if I don't know whether the system I'm running on will have dual monitors?

Animatronic

SM_CXSCREEN gives you the width of the primary monitor.

take a look at the GetSystemMetrics() documentation here .

i think you want SM_XVIRTUALSCREEN and SM_YVIRTUALSCREEN for the total screen area.

uman

Well, you're wrong: it's SM_CXVIRTUALSCREEN and SM_CYVIRTUALSCREEN, but you pointed me in the right direction, and for that I thank you.