Hi Evelyn.

i have a combo where recordsource is (select * from comments). user has to select from the records in table comments.

The sumplest approach is going to be to change the RowSourceType of your combo to either 2-Alias or 6-Fields. Then, you add a little bit of code like this in the Valid() of the combo:

lcDisplayValue = ALLTRIM( This.DisplayValue )
IF NOT EMPTY( lcDisplayValue ) AND This.ListIndex = 0
  *** The user has typed something that is not in the combo's list
  *** add it to the underlying data now
  INSERT INTO Comments ( < Field Name > ) VALUES ( lcDisplayValue )
  TABLEUPDATE( 0, .F., [Comments] )
  This.Requery()
ENDIF