Bruce,

IN the combo's requery put this code;

* Combo Requery
LOCAL lnNewItem
WITH THIS
   lnNewItem = .NewItemId + 1
   SCAN
     IF Active
         .AddListItem(Name,lnNewItem,1)
     ELSE
         .AddListItem("\"+Name,lnNewItem,1)
     ENDIF
     lnNewItem = .NewItemId + 1
    ENDSCAN
ENDWITH

Now set the rowsourcetype to None and the rowsource is blank.

Whenever you need to update the combo call its requery.