Access graphics in C++? Oh, no, that's the job of a graphics library. And there's no need to reference .NET anyways - if you did, how would games for linux exist? As far as libraries go, personally I use Allegro. But I guess SDL, SFML, etc. are pretty good too. You might try looking them up. There's really no need to go down to OpenGL/DirectX anymore.
I have another question. Apparently, to access graphics in C++, it's necessary to reference to .NET... however, this won't allow the program to compile down to machine code.