I have problems compiling Nehe''s Tutorials Nr.6, 7. Everytime I want to compile I get this message: c:\opgl\lesson04\lesson4.cpp: In function `int LoadGLTextures()'': c:\opgl\lesson04\lesson4.cpp:110: implicit declaration of function `int free(...)'' Can somebody help me. I am using Dev-C++ compiler. I had to add #ifndef CDS_FULLSCREEN #define CDS_FULLSCREEN 4 #endif to make the previous tuts work.