Don't modify any of the system headers (like glee.h or windows.h).
This .cpp file compiles fine for me:
#include "stdafx.h"
#include <Windows.h>
#include "GLee.h"
int _tmain(int argc, _TCHAR* argv[])
{
return 0;
}
This is all you need. There is no need to include gl.h when including glee.h. Actually you don't have to include Windows.h as well because its already included by glee.h, but that doesn't matter.