Hi Mike.

Actually this is not my worry now. When I unbind it in the init, the combo's values are no longer saved in the table.

Did you remember to call UpdateControlSource() from the combo's Valid()?

LOCAL lcAlias, lcControlSource
WITH This
  IF ! EMPTY( .cControlSource )
    lcAlias = JUSTSTEM( .cControlSource )
    IF UPPER( LEFT( lcAlias, 4 ) ) == 'THIS'
      lcControlSource = .cControlSource
      STORE .DisplayValue TO &lcControlSource 
    ELSE
      REPLACE ( .cControlSource ) WITH .DisplayValue IN ( lcAlias )
    ENDIF
  ENDIF
ENDWITH