error C2065: ‘GL_REFLECTION_MAP_NV’ : undeclared identifier

Any ideas??
I have all of glut.h gl.h glaux.h glu.h


Check nVidia’s site or this site for the glext.h. That’s where the definition for extensions are found. As an extension, you should be sure to check if it is actually supported using glGetString(GL_EXTENSIONS). The extension string for that extension is GL_NV_texgen_reflection, I believe.