template<typename OBJ, typename MFP, typename RET>
class StateCallback
{
private:
	MFP memberFun;
	OBJ object;
	RET ret;
	StateCallback() { }

public:
	StateCallback(OBJ object, MFP memberFun) : object(object), memberFun(memberFun), ret(ret) { }
	RET operator ()() { return ((object)->*(memberFun))(); }
};

//Usage example
StateCallback<CGameManager*, StateMemFunPtr, bool> game(this, &CGameManager::RunGame);
states.push(game);

while(states.size())
{
	StateCallback<CGameManager*, StateMemFunPtr, bool> a = states.top();
	a();
}