- window->MacGetPortClientParams(&m_macLocalOrigin, &m_macClipRect , &windowref , &rootwindow );
+ Rect clipRect ;
+ window->MacGetPortClientParams(&m_macLocalOrigin, &clipRect , &windowref , &rootwindow );
+ SetRectRgn( m_macBoundaryClipRgn , clipRect.left , clipRect.top , clipRect.right , clipRect.bottom ) ;
+ CopyRgn( m_macBoundaryClipRgn , m_macCurrentClipRgn ) ;