Referencing Field not on Form

[Dave]

How can I reference a field in the query underlying the form but not placed
on the form? Or do I have to place the field on the form and if not used
make it not visible?
Thanks

 

[John Vinson]

How can I reference a field in the query underlying the form but not placed
on the form? Or do I have to place the field on the form and if not used
make it not visible?

Me!fieldname will work, even if there is no control bound to that
field.