Even a cursory look at Wikipedia would let the author know that MS was a part of the original OpenGL ARB till 2003 and was even a voting member along with all the big backers. http://en.wikipedia.org/wiki/OpenGL_Architecture_Review_Boar...

>They later started emphasizing Direct3D as the preferred way to do 3D, possibly because supporting OpenGL would make porting 3D-heavy games to other platforms easier.

With the side effect that the standard moved much faster unlike OpenGL that got stuck in the 'design-by-committee' hole, not to mention a much cleaner API with way better dev tools and features.