void MainWnd::OnToolsMapview()
{
  if(theApp.cartridgeType == 0) {
    MapView *dlg = new MapView;
    dlg->Create(IDD_MAP_VIEW, this);
    dlg->ShowWindow(SW_SHOW);
  } else {
    GBMapView *dlg = new GBMapView;
    dlg->Create(IDD_GB_MAP_VIEW, this);
    dlg->ShowWindow(SW_SHOW);
  }
}