class MainWindow: public TopWindow {
  BaseWidget widget*;
};
void MainWindow::ChooseWidget() {
widget = WidgetFactory(widget_id);
this.Add(&*widget);
widget->SetupHotKeys(this);
}

class BaseWidget: public Ctrl {
public:
  virtual void SetupHotKeys(TopWindow &tw) = 0;
};
class RealWidget: public BaseWidget {
  void foo1();
  void foo2();
  void SetupHotKeys(TopWindow &tw) {
    tw.SomeKindOfAssignKey(K_A, THISBACK(foo1));
    tw.SomeKindOfAssignKey(K_SHIFT_A, THISBACK(foo2));
  }
};

dword Switch::GetAccessKeys() const
{
	dword keys = 0;
	for(int i = 0; i < cs.GetCount(); i++)
		keys |= AccessKeyBit(cs[i].accesskey);
	return keys;
}

void  Switch::AssignAccessKeys(dword used)
{
	for(int i = 0; i < cs.GetCount(); i++) {
		Case& v = cs[i];
		if(!v.accesskey) {
			v.accesskey = ChooseAccessKey(v.label, used);
			if(v.accesskey) Refresh();
			used |= AccessKeyBit(v.accesskey);
		}
	}
	Ctrl::AssignAccessKeys(used);
}