>I have *lots* of fields that are B(16)
>
>If I want to display that number rounded to the fourth decimal, for example, in a textbox what are my options for formatting the display ( assuming not just creating a dummy display field and converting the number )
>
>Seems there should be an easy trick to it, but I'm not seeing a format that looks right and I can't use an input mask for display - or can I ?

Why not ?
Perhaps transform() function might be helpful as well.

Hey, You better be careful ! Where you are at, one nasty bug might cost world economy trillions of dollars.
Uuuups... There goes another 500pts plunge ... {g}