>Jim,
>
>That makes two of you who have responded the same way.
>
>I'm just wondering why a Format property or InputMask property wouldn't work?
>
>Regards,
>Jim N
Jim,

Because a format or inptumask only limits the nature of the characters that can be entered, by making the datatype of the control's value you are tapping into VFP's internal data type validation.