<desc>If specified, the color modulation of the overlay is returned instead. The overlay must be set using <funclink>SetGraphics</funclink> first.</desc>
<desc>Determines the color modulation of an object. This is a color value which is multiplied (or added, according to BlitMode) with the object graphics. For more information see <funclink>SetClrModulation</funclink>().</desc>
<remark>A return value of -1 means that no color modulation is done. This corresponds to <funclink>RGBa</funclink>(255,255,255,255).</remark>