Then this must be no glh_genext.h file in sdk\include\glh folder.
Go and check it out above folder man.
Do u know what is this header file for…?
Come on and be a little more appreciate.
FYI.Not all the program in the net is error free.
Sounds like the glext.h you have does not match the one that glh_genext.h needs. The one it needs is in {SDK_ROOT}/include/glh/GL/glext.h.
Please also note that this is a “non-standard” glext.h, but it is required until we get all the new NV extensions included in the one that SGI maintains.