Hello, I think the title says it all. How could I implement, lets say, a library, in which the application's entry point (main()) is overriden?. I've seen such behaviour in SDL, and in wxwidgets. I think the former uses a simply new name for main() -IIRC-, and the latest uses a class method as the entry point. Maybe I didnt clarify my question very well, so, what I meant was not how to make an entry point in the sense of, for example, creating an OO library where you instanciate a class and call a function like Library l=new Library(...); l.init(); But rather how to modify the entry point of the app itself, which would be main() in a plain c console project or WinMain() in a windowed win32 app. Is this easy to implement? Thanks /Edit I guess I was wrong about SDL, what it really does is to create a main() to replace WinMain() in win32 platform, and I guess its pretty much the same for other platforms; and this is still a "mistery" for me on how its done.

What I've seen thus far, many libraries tackle this with some preprocessor magic, like:

#ifdef _WIN32#define MAIN_FUNCTION int WINAPI WinMain( HINSTANCE hInst, HINSTANCE prevInst, LPCSTR cmdLine, INT nCmdShow )#else#define MAIN_FUNCTION int main( int argv, char *argv[] )#endif#define MYLIB_MAIN_CLASS(clzName) MAIN_FUNCTION {                                                                           clzName __myStartClass;                                       __myStartClass.run();                                  }

Edit: The forum seems unable to handle the backslashes in the macro...

Ok, thanks a lot guys, it doesnt seem too hard to implement then