'twelve', 'thirteen', 'fourteen']
 
         wxStaticText(self, -1, "This example uses the wxCheckListBox control.",
-                               wxPoint(45, 15))
+                               (45, 15))
 
-        lb = wxCheckListBox(self, 60, wxPoint(80, 50), wxSize(80, 120),
+        lb = wxCheckListBox(self, 60, (80, 50), (80, 120),
                             sampleList)
         EVT_LISTBOX(self, 60, self.EvtListBox)
         EVT_LISTBOX_DCLICK(self, 60, self.EvtListBoxDClick)
         lb.SetSelection(0)
+        self.lb = lb
+
+        btn = wxButton(self, -1, "Test SetString", (180, 50))
+        EVT_BUTTON(self, btn.GetId(), self.OnTestButton)
 
         EVT_RIGHT_UP(self, self.OnDoPopup)
 
     def EvtListBoxDClick(self, event):
         self.log.WriteText('EvtListBoxDClick:\n')
 
+    def OnTestButton(self, evt):
+        self.lb.SetString(4, "FUBAR")
+
+
     def OnDoPopup(self, evt):
         menu = wxMenu()
         # Make this first item bold