I think(and please forgive me If I am wrong but I want to get done with it) that there is an incompatibility issue between GLee and VC8(VC2005) I downloaded the GLee latest version and link it to my application. When I tried to use an extension function the Linker didnt find the file LIBC.LIB I found the file from an older version of Visual Studio, the application compiled and run normally except a warning message from Linker: LINK : warning LNK4098: defaultlib 'LIBC' conflicts with use of other libs; use /NODEFAULTLIB:library ?

When using GLee I've found it best to include the .c/.cpp file in with your application and not link to the lib.

Thanks a lot phantom.