>How do I enforce a valid date on a textbox. The textbox is defined as char at the moment and in the init= thisform.textbox1.value=DATE() and
>thisform.textbox1.Format='D' . However, I can enter bogus dates.

Simply make it bound to some date value. If u need character representation
of it, you can keep it parallely stored in some property.
Otherwise you hv to write complex validation proc for something that is already there for you.

2c