Various methods to detect opengl?

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Rob Cummings

I am more interested in doing this:

If you are using the Win32 interface (as opposed to GLUT), call DescribePixelFormat() and check the returned dwFlags bitfield. If PFD_GENERIC_ACCELERATED is clear and PFD_GENERIC_FORMAT is set, then the pixel format is only supported by the generic implementation. Hardware acceleration is not possible for this format. For hardware acceleration, you need to choose a different format.

Because sometimes the GL_RENDERER field is blank for machines WITH and WITHOUT opengl Hardware acceleration!

Any ideas?