Master Detail Form in VB w/ Three Tables

Hi:
I am a novice VB programmer, and need to get a master/detail (parent child) form similar to the one that let’s you create via the Forms Wizard Dialog, but need to join three tables, not just two. I don’t know how to go about this, or how to add the third table, and really need some step-by-step advice. Basically, the two tables are joined to the third one, ea with their respective pkey ids. Please advise.