Call Invoice from Creator?

Call Invoice from Creator?

Is is possible to create an invoice upon clicking the 'Submit' button in Creator? I have a registration form in Creator and I would like to send customer and item information from there to Invoice so that my customers can register for an event and make payment in the same workflow. Ideally, Invoice would send a 'transaction complete' message back to Creator, but that may be asking too much.

Thanks,
J--