Ty I didn't feel like repeating myself.
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Nothing explicitly saying you can't, just don't because OpenGL and D3D are different is the bottom line. Comparing two different graphic bases like this is like comparing two different languages. It would be complex, tedious, and processor intensive transferring OpenGL and D3D objects, like converting VB into Java back and forth for lack of a better example. The bottom line is, it's not like the two are made to support eachother in anyway shape or form so it's only natural that they don't, so in order to get them to do so you'd have to jump through hoops and loops at a low level since they handle things differently at a low level.