## MMPM/2 Device Driver Reference

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### VCASETCOLORKEY Field - ulColorKey

ulColorKey (ULONG) VCASETCOLORKEY value is based on the number of colors supported by the display driver. When in palletized mode (less than or equal to 256 colors), VCASETCOLORKEY is a palette index; when in 16-bit color mode, VCASETCOLORKEY is an RGB-565 color; when in 24-bit color mode, VCASETCOLORKEY is an RGB-888 color.