Hi ! This is my first post and i don't speak very good English. I come from the french Forum, and this is my problem : When I use the function "PixelGetColor" (who return the color of one pixel) on Windows XP, the function takes ~0,3 ms, On windows Vista or Seven, the function takes ~20,3 MS for 1 Pixel ! When i disable the Aero theme and replace it with Windows Classique Theme I get the same result as in XP. how can I do to get better results with Vista Aero ? Sorry for my English Thank you in advance, and thanks to Google translation