Try this

ocon.Properties.Item("SET NULL").Value = .F.

It should be the same as SET NULL OFF but who knows.

>I was mistaken.
>
>I thogut you mean do a SET NULL OFF in my program, then
>pass my command string to ADO.
>
>I passed the SET NULL OFF, then the command string to the
>ADO command, and go no errors, however, the record was not
>added to the table either.