Simple question about installing opengl

where do you install/download the opengl sdk, I can’t find it anywhere… ???

If you install Visual C or Mingw Studio Developer or Dev C or…, in the directory, for example
Microsoft Visual Studio\VC98\Include\GL
you find the .h libraries and in C:\Programmi\Microsoft Visual Studio\VC98\Lib
you find the other files…

Once you do that you could download the latest drivers and an SDK from a major card designer like NVIDIA or ATI. You want glext.h and wglext.h fortunately you can get the official shared headers here that are a superset of all vendor ARB and common extensions:

The latest drivers from your graphics card designer and the latest headers is really all you need for an SDK.