You could configure that as a formula on the Properties dialog for the checkbox, on its Value tab. The check box would need to be bound to Outlook fields. The formula would then look like this:

[TextBoxFieldName] "0"

--
Sue Mosher, Outlook MVP
Author of Microsoft Outlook 2007 Programming:
Jumpstart for Power Users and Administrators
http://www.outlookcode.com/article.aspx?id=54


"boreal" wrote in message ...
I don't have much experience designing forms in Outlook 2003 and I need to
customise an existing (customised) form. This shouldn't be difficult, but I
can't find what I'm looking for...

Basically, I have a text field that stores numeric data and a checkbox. The
default value in the text field is '0'. When this value is other than '0', I
want the checkbox to become checked.

Where do I go to configure this event-based rule? I'm looking at the
properties of the controls in question and not finding the means to do this
simple task.