Remove apply()
diff --git a/Demo/tix/tixwidgets.py b/Demo/tix/tixwidgets.py
index de2e22e..bf7102a 100644
--- a/Demo/tix/tixwidgets.py
+++ b/Demo/tix/tixwidgets.py
@@ -71,8 +71,7 @@
hm.add_checkbutton(label='BalloonHelp', underline=0, command=ToggleHelp,
variable=self.useBalloons)
# The trace variable option doesn't seem to work, instead I use 'command'
- #apply(w.tk.call, ('trace', 'variable', self.useBalloons, 'w',
- # ToggleHelp))
+ #w.tk.call('trace', 'variable', self.useBalloons, 'w', ToggleHelp))
return w