[AccessD] Triple State Check Box

Hi,
I've been playing around with the triple state property of a checkbox on a
bound multirecord subform bound to a Yes/No field in the backend table.

To make it work I finally had to bind the check box control to a field with
a different datatype.
It's now bound to an integer field
with default value of 'null'
and validation rule set to: 'Between -1 And 0 Or Is Null' .

Now it works.

But : Is that the (only) way to do it, or have I overlooked something?

Regards
Borge


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