self.ReleaseMouse()
 
     def OnRightUp(self, evt):
-        self.Show(false)
+        self.Show(False)
         self.Destroy()
 
 
 
     def ProcessLeftDown(self, evt):
         self.log.write("ProcessLeftDown\n")
-        return false
+        return False
 
     def OnDismiss(self):
         self.log.write("OnDismiss\n")
         sz =  btn.GetSize()
         win.Position(pos, (0, sz.height))
 
-        win.Show(true)
+        win.Show(True)
 
 
     def OnShowPopupTransient(self, evt):
         sz =  btn.GetSize()
         win.Position(pos, (0, sz.height))
 
-        win.Show(true)
+        win.Show(True)
 
 class TestPopupWithListbox(wxPopupWindow):
     def __init__(self, parent, style, log):