eg.void CExample::FirstFunction(){  // When you're calling a function from this class...  SecondFunction();  // ...you're actually doing this:  this->SecondFunction();  // You can also use the last one if you like but it's just  // more typing.  // Sometimes it can be handy to call it with the this pointer  // when there are 2 functions with the same name: 1  // in the class and 1 global function.  // Then just call this->TheFunction() and the function in this  // class will be executed instead of the global function.}    However, when using callbacks there's one little tiny small problem: you can't attach a function pointer meant for __cdecl to a pointer declared with thiscall.So we need a way to get around this problem.The solution is simple: make the callbacks in your class static!But now there's another problem.. when a member function is static you can't acces the member variables.There are various ways to get around this problem but that depends on what you like most.        // this...  void TheGame::drawFrame();  // ...should be like this when using callbacks in classes  static void TheGame::drawFrame();  // NOTE: You only have to do this in front of the declaration.  //       (header)