The DDCOLORCONTROL structure is defined as :-

struct DDCOLORCONTROL {
DWORD dwSize;
DWORD dwFlags;
LONG lBrightness;
LONG lContrast;
LONG lHue;
LONG lSaturation;
LONG lSharpness;
LONG lGamma;
LONG lColorEnable;
DWORD dwReserved1;
};