Well, I just downloaded the Game Tutorials OpenGL code for loading 3DS files, and I was trying to make the structures into a class, So I placed the Render function inside these classes. The problem is: I have the C3DModel class and the C3DObject class. Now, the C3DObject class has a pointer to the C3DModel class that is holding his textures, but the C3DModel class has an array of C3DObjects. So, when I try to compile it, if says that on the C3DObject the C3DModel pointer isn''t declared on this scope, but it is right bellow him. But if I place it on top, then he will say that the C3DObject wasn''t declared yet. Any ideas how to work this out??? Thanks.

There is a difference between declaration and definition.

Add a declaration (class C3DModel;) before C3DObject''s definition - or the reverse.

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Thanks, that solved it!