I am trying to draw some bitmap and set some of the bits to transparent. I have been searching the web and found some pages that use ddutil.cpp and ddutil.h for directdraw. I have tried to add these programs to my aplication but cannot get it to compile (getting errors with all lines containg IDirectDrawSurface7) I have included ddraw.lib to the link command in the project, but still cannot get it to work. Is there some setting I am missing, or any other way to turn off a certain color of a bitmap. Thanks for any help