Is it allwrite to mix some part of Direct X in with my Open GL Api? e.g. If I wanted to do a gamma fade using DX in my O GL base code thx J

No... you should not mix OpenGL, Direct Draw or Direct DDD, but you can use Direct Input/Music/bla bla with OGL.

Grtz MgFun

Basically it should work but some video cards have problems mixing DirectDraw and OpenGL together. So I shouldn''t bother to do it because you never know what video card will users of your engine have.