Hi Jimmy.
>> Does anyone know how to set up a combo that a user can add choices to? <<
First of all, you need to make sure that the style of the combo is 0-DropDown Combo. Then you need to take some action in the combo's valid to check to see if the user typed in something new and then take action to add it to the combo's RowSource with code similar to this:
WITH This
IF .ListIndex = 0 AND !EMPTY( .DisplayValue )
.Requery()
.Refresh()
ENDIF
ENDWITH
Marcia