[Gtk-sharp-list] ComboBox(Entry) in a TreeView

[s22157809 at student.up.ac.za]

Hi there

Is there a way to have some kind of a ComboBox in a TreeView.  In a POS 
system, I would like the user to select an item from the DropDown within the 
grid, but I can't see an easy way to do this.

Any help will be appreciated.

Thanks

Regards,
Ian