This works fine for me, and is very useful.

You can't nest tab controls on each other, so:

* start with main form
* tab control 1 is placed on main form
* subform 1 is placed on tab control 1
* tab control 2 is placed on subform 1
* subform 2 is placed on tab control 2
* tab control 3 is placed on subform 2
* subform 3 is placed on tab control 3
* etc.

A reference to the lowest-level subform can be done this way:

Forms.mainForm.Form.subForm1.Form.subForm2.Form.su bForm3.Form.RecordSource =
"sql statement"

Nothing too groundbreaking. Just wondering if others have tried it, and
have gone any levels deeper?