displaying a checkbox inside a listbox for true/false values

I can't seem to format my listbox so that the field which is true/false should show as a checkbox either with a tick inside or not.
Even if I format the source of the listbox to a on/off field, it still insists on showing true or false
Any ideas?
Also anyone know how to format a listbox so every alternate row is shaded?
Thanks

To the best of my knowledge you can do neither.

Jack