Thanks, I'll look more closely.

>The display of MessageBox has nothing to do with SET NOTIFY.
>
>I am thinking maybe the following portion of code:
>

>IF !EMPTY(chrtran(This.Text,"/.","")) AND EMPTY(This.Value)
>    =ErrorMsg("Wrong date typed!")
>   WAIT WINDOW NOWAIT "Wrong date typed!"
>   RETURN 0
>ENDIF
>

>the condition is never met, in other words, your if statement evaluated to false.
>So your message display code was never excuted. I would reexamine the statement.