Hi there , I started OpenGL programming in C (.net) a while ago. Some OpenGL functions (such as glActiveTexture , originally defined in glext.h) wouldn't work properly (undeclared identifier error) unless I added lines like this in my code: PFNGLACTIVETEXTUREPROC glActiveTexture =(PFNGLACTIVETEXTUREPROC) wglGetProcAddress ("glActiveTexture"); It didn't matter much then because the functions were few. Now I started programming in GLSL and I need many functions defined in glext.h , and it is rather inconvenient to do the above for every single function I need to use. How is it possible to have these functions properly defined in glext.h as they should?

Quote:Original post by Gorgi
Hi there , I started OpenGL programming in C (.net) a while ago. Some OpenGL functions (such as glActiveTexture , originally defined in glext.h) wouldn't work properly (undeclared identifier error) unless I added lines like this in my code:

PFNGLACTIVETEXTUREPROC glActiveTexture =(PFNGLACTIVETEXTUREPROC) wglGetProcAddress ("glActiveTexture");

It didn't matter much then because the functions were few. Now I started programming in GLSL and I need many functions defined in glext.h , and it is rather inconvenient to do the above for every single function I need to use. How is it possible to have these functions properly defined in glext.h as they should?

Welcome to the wonderful world of OpenGL Extensions! [smile]

As you've found out, including glext.h isn't all you need to do. You still need to get a pointer to the functions so that you can actually use them. I recommend, instead of doing all that manually, just use an extension loading library such as GLee or GLEW. It is much less of a hassle that way.

glee.h did the job just fine , thanx a lot :)