622             return True

   622             return True

   623         return False

   623         return False

   624 

   624 

   625     def OnCloseFrame(self, event):

   625     def OnCloseFrame(self, event):

   626         if self.TryCloseFrame():

   626         if self.TryCloseFrame():

   627             event.Skip()

   628             event.Skip()

   628         else:

   629         else:

   629             # prevent event to continue, i.e. cancel closing

   630             # prevent event to continue, i.e. cancel closing

   630             event.Veto()

   631             event.Veto()

   631 

   632