Retrieving color value of a pixel

[kurtk]

Hello,

is it possible to retrieve the color value of an arbitrary pixel on the screen, without knowing (or caring) what window this pixel "belongs" to? And how?

Thank you very much.

[golanshahar]

yes you can :)

here is a sample that take pixel value from screen at the 100,100 position:


HDC dc = ::GetDC(0);
COLORREF Color = ::GetPixel(dc,100,100);
int R = GetRValue(Color);
int G = GetGValue(Color);
int B = GetBValue(Color);
::ReleaseDC(0,dc);



Cheers