Binding Checkboxes!

Hi all!
I have a form to represent records in a table, all data is uploaded in a dataset. One of the fields can be 0,1 or NULL and I want that to be a checkbox on the form. It all work fine until the value of the field is NULL, when this happen I can't show that records on the form.
Is there anyway to tell the checkbox to treat NULL value as 0 or something like that?

Thanks for any suggestion or help!

/ Peter J
This message is printed on 100% recycled electrons!
[501 byte] By [peter_m_j] at [2007-11-17 13:05:58]