struct MyAppWindow : TopWindow {
    Point  p;
    Ctrl c1;
    Button button;
    virtual void LeftDown(Point pos, dword flags) {
		c1.Add(button.SetLabel("Button").LeftPosZ(10, 64).TopPosZ(10, 24));
        c1.PopUp(this,false,true,false,true);
        p = pos;
        Refresh();
    }