GtkCombo is a text entry box
with a drop-down menu "quick choices." If you want to
limit the user to a fixed set of options, a GtkOptionMenu is more appropriate. GtkCombo allows the user to type
in anything, but offers some suggestions as well. GnomeEntry is a combo box that
adds items the user types in to the list of choices in
the drop-down menu, and automatically remembers the
list from session to session.
