protected override void OnClick()
 {
     if (_dlg != null)
     {
         return;
     }
     _dlg          = new CommonUseWindow();
     _dlg.Closing += ProWin_Closing;
     _dlg.Owner    = FrameworkApplication.Current.MainWindow;
     _dlg.Show();
 }
 void ProWin_Closing(object sender, System.ComponentModel.CancelEventArgs e)
 {
     _dlg = null;
 }