Signal0 onDestroyed;
Signal3<const WindowVector&, ButtonIdentifier, ModifierFlags> onMouseDown;
void mouseDown( const WindowVector& position, ButtonIdentifier button, ModifierFlags modifiers );
-typedef Member3<XYWnd, const WindowVector&, ButtonIdentifier, ModifierFlags, void, &XYWnd::mouseDown> MouseDownCaller;
+typedef Member<XYWnd, void(const WindowVector&, ButtonIdentifier, ModifierFlags), &XYWnd::mouseDown> MouseDownCaller;
};
inline void XYWnd_Update( XYWnd& xywnd ){