self.useNative = wx.CheckBox(self, -1, "Use native listctrl")
             self.useNative.SetValue( 
                 not wx.SystemOptions.GetOptionInt("mac.listctrl.always_use_generic") )
             self.useNative = wx.CheckBox(self, -1, "Use native listctrl")
             self.useNative.SetValue( 
                 not wx.SystemOptions.GetOptionInt("mac.listctrl.always_use_generic") )