def Button_Box(self):

        #----------------------------
        #  Create bottom button bar
        #----------------------------
        okay_btn   = wx.Button(self.panel, -1, "OK")
        help_btn   = wx.Button(self.panel, -1, "Help")
        cancel_btn = wx.Button(self.panel, -1, "Cancel")
        #-------------------------------------------------        
        box = wx.BoxSizer(wx.HORIZONTAL)
        proportion = 0
        border = 5
        box.Add((20,20),    proportion, border)
        box.Add(okay_btn,   proportion, border)
        box.Add((10,10),    proportion, border)
        box.Add(help_btn,   proportion, border)
        box.Add((10,10),    proportion, border)
        box.Add(cancel_btn, proportion, border)
        box.Add((10,10),    proportion, border)        
        # box.AddMany([okay_btn, help_btn, cancel_btn])
        #-----------------------------------------------------
        self.Bind(wx.EVT_BUTTON, self.On_OK,     okay_btn)
        self.Bind(wx.EVT_BUTTON, self.On_Help,   help_btn)
        self.Bind(wx.EVT_BUTTON, self.On_Cancel, cancel_btn)

        return box