brush.MacSetTheme( kThemeBrushDocumentWindowBackground ) ;
else if ( newCol == wxSystemSettings::GetColour( wxSYS_COLOUR_3DFACE ) )
brush.MacSetTheme( kThemeBrushDialogBackgroundActive ) ;
brush.MacSetTheme( kThemeBrushDocumentWindowBackground ) ;
else if ( newCol == wxSystemSettings::GetColour( wxSYS_COLOUR_3DFACE ) )
brush.MacSetTheme( kThemeBrushDialogBackgroundActive ) ;