DDirectDraw
TDDColorKey = record
dwColorSpaceLowValue: Longint;
dwColorSpaceHighValue: Longint;
end;
PDDColorKey = ^TDDColorKey;
The TDDColorKey structure describes a source color key, destination color key, or color space. A color key is specified if the low and high range values are the same.
See DDCOLORKEY for more information.