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[MSDN Library June 1998] OpenGL on Windows NT and Windows 95 (22.9271870554765%)

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[MSDN Library June 1998] OpenGL Correctness Tips (21.466933966934%)

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[MSDN Library June 1998] OpenGL State Variables (20.9482859482859%)

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MSDN Library Visual Studio 6.0 > Platform SDK > Graphics and Multimedia Services > OpenGL > Overview > Introduction to OpenGL > Obtaining State Information