How to pass an ID though a button

[alexandervj]

I'm trying to pass an ID from one form to another form when the user clicks a button as described in this thread...

http://stackoverflow.com/questions/1...orm-to-another

but I'm a noob and the thread doesnt explain it in enough detail. It sounds to me like i need to put this code in the buttons Onclick event:
forms(parentFormName).recordset.fields(fieldName). value

Is this correct? And how to I assign the ID to a value in the child form? Thanks!

[June7]

Is this a form/subform arrangement (one form installed on another form)? If yes, then set the Master/Child properties links of the subform container control and no code is required.

[alexandervj]

I dont think its a subform, I have basically one popup modal form with details about a product lot, a button on this form labeled "Add" is to add a product to this product lot. When you press the add button another modal pops up ontop of the last form, but I dont want to have to fill out the lot information every time I want to enter a product, so I want to pass the LotID through the add button where I pick it up again in the "Add Product to this Lot" form and it assigns the appropriate Lot information based on the LotID

[June7]

So why not a form/subform?

There are several ways to go about populating the foreign key field with the LotID. One way is to set the DefaultValue property of textbox as a reference back to the calling form LotID field or control.
Forms!formname.LotID

Be sure to set textbox as Locked Yes and TabStop No.