>>>Well, the value (or ControlSource) is an Integer. The format and mask just display it with the colon in between
>>>So, if you want an hour you would enter 100. For one second enter 1
>>>
>>>How would the textbox know that 1 is either one second or one hour ?
>>
>>I'm not sure, but in my opinion it's inconvenient. I'd rather try with the classes Marcia suggested if I can get ahold of the article...
>
>Ok, sorry for the inconvenience

Gregory,

No problem, sorry for being so picky :) Anyway, I'm going to get classes from the book soon, so I may adapt them instead.

The idea of this texbox basically works and it may work for my users too...

Anyway, I'll play with other classes too and compare.

Thanks again for your great input.