WindowGroupRef overlaygroup = NULL;
verify_noerr( CreateWindowGroup( kWindowGroupAttrMoveTogether | kWindowGroupAttrLayerTogether | kWindowGroupAttrHideOnCollapse, &overlaygroup ));
verify_noerr( SetWindowGroupParent( overlaygroup, GetWindowGroup( (WindowRef) m_macWindow )));
verify_noerr( SetWindowGroup( (WindowRef) m_macWindow , overlaygroup ));
WindowGroupRef overlaygroup = NULL;
verify_noerr( CreateWindowGroup( kWindowGroupAttrMoveTogether | kWindowGroupAttrLayerTogether | kWindowGroupAttrHideOnCollapse, &overlaygroup ));
verify_noerr( SetWindowGroupParent( overlaygroup, GetWindowGroup( (WindowRef) m_macWindow )));
verify_noerr( SetWindowGroup( (WindowRef) m_macWindow , overlaygroup ));