win32 Window Background colour

Im trying to get the background the same as the light gray the text uses, as it background, ive tried the following with no luck, #define WHITE_BRUSH 0 #define LTGRAY_BRUSH 1 #define GRAY_BRUSH 2 #define DKGRAY_BRUSH 3 #define BLACK_BRUSH 4 #define NULL_BRUSH 5 #define HOLLOW_BRUSH NULL_BRUSH thanks