class Main : public Application, public EventListener
{
    public:
        virtual int main(const List<String>& args)
        {
            root = Root::instance();

            video = root->videoManager();

            input = root->inputManager();

            video->init(Size(640, 480), 32, "Hello World", false);

            while (root->running())
            {
                input->capture();

                video->beginDraw();

                // draw everthing

                video->endDraw();
            }

            return 0;
        }

    protected:
        virtual void quitEvent()
        {
            root->shutdown();
        }

    private:
        Root* root;
        VideoManager* video;
        InputManager* input;
} app;