GIF_TranspColor is the transparency coolor (If GIF_FlagTranspColor is true).
This color should exist in the image.
Assembly: IEvolution2 (in IEvolution2.dll) Version: 14.0.0.0
| IEvolution (ImageEn for .Net) | 
| IOParams..::GIF_TransparentColor Property | 
GIF_TranspColor is the transparency coolor (If GIF_FlagTranspColor is true).
This color should exist in the image.