>Hi Naomi
>
>>I'll do, but after I sent my message I realised, I used integer duration and not a datetime. But perhaps it still can be adopted.
>>
>>I'll check my e-mail in few minutes.
>
>Thanks.

I've sent you the class. Since gmail doesn't allow ZIP to be sent, I renamed the file to zop. I perform conversions in SetValue and in Valid I use replace command to update field value. The textbox is unbound.