Help!

I have a tabctl on a form with three tabs.
Tab1 is the mian form
Tab2 is a subform1
Tab3 is subform2

When the main form records change, I need the two subforms to follow with their respective tables.
However, subform2 is dependent on a mainform ID and a subform1 ID field.

How can I get this to work?
Also, how do I reference the controls on the Subforms? I can't make heads or tails out of the Access97 Help files using the tabCtl!PAges(1)!Subform...stuff! (Give me normal structure variables any day!)

IF I need to redesign the DB then I will...
Thanks
Lyle Steinhardt