+ // setup a separate group for each window, so that overlays can be handled easily
+ verify_noerr( CreateWindowGroup( kWindowGroupAttrMoveTogether | kWindowGroupAttrLayerTogether | kWindowGroupAttrHideOnCollapse, &group ));
+ verify_noerr( SetWindowGroupParent( group, GetWindowGroup( (WindowRef) m_macWindow )));
+ verify_noerr( SetWindowGroup( (WindowRef) m_macWindow , group ));
+