wxListBox *list = wxDynamicCast( owner->GetWXPeer() , wxListBox );
wxMacDataBrowserCellValue valueholder(itemData);
list->GetValueCallback( n , col, valueholder );
wxListBox *list = wxDynamicCast( owner->GetWXPeer() , wxListBox );
wxMacDataBrowserCellValue valueholder(itemData);
list->GetValueCallback( n , col, valueholder );