Access 2007 Subforms of a Main Form question

Hi ever

How can I reference fields of a subform placed on a main form.  I have a subform that loads with a Mainform that is pulling data based on a parameter of "TS" and "VAP" for type.  I have the user adding records to subform called ProductsInvoiceRec.  I have set the prperties of this subform to load on the mainform and automatically go to the next record on the form load event.  I also need two other subforms that are loaded based on a parameter of "TS" and "VAP" .  These subforms are taking the records which are TS and Vap and making Subtotals.  I need for these two forms to clear out.  In other words, I outneed all of the fields on these two subforms to clear out and make spaceseverytime a new record is added on the ProductsInvoiceRec on the Inoice Main form.

ow can I reference the invidual fields of a subform on the Load, AfterUpdate, and Before Update events in the properties of these two forms using the form preoprties?

I can't use a datasheet for this project.

jjc9809
TradeShow1.accdb