Where can I find all the header files and stuff?

I just seem to be too stupid to find the OpenGL Header-Files…
I used DirectX so far and as me and two friends of mine want to do a cross platform game I have to learn OpenGL now.
Sure that you all say OpenGL is better
Btw.: Has anyone of you any experiences using SDL + OpenGL + Windows?

Thanks in advance!

Most compilers include the standard opengl headers in their include\gl directory. When you including the header in a source file use
#include <gl\gl.h>
#include <gl\glu.h>

If you’re on Windows you can get OpenGL SDKs from www.nvidia.com\developer and www.atitech.com. Not certain of the SDKs are video card specific though.

It is there…