Try

* Combo Valid
IF NOT EMPTY( This.DisplayValue )  ;
		AND NOT (ALLTRIM(This.DisplayValue) == ALLTRIM(This.Value))
	INSERT INTO mytable VALUES (This.DisplayValue)
	This.Value = This.DisplayValue
	THIS.Requery()
ENDIF

>
>I have a combo box bound to a field (ControlSource has the field name), property .BoundTo is .T.. The RowSourceType is 6 - Fields and the RowSource is names of the fields. The style of the combo is 0 - DropDown Combo. I would like the user to be able to enter a value that is not in the RowSource cursor.
>