Master/Detail Form in VB w/three tables

I am a novice VB programmer and need to create a master/detail form similar to the one created by the Forms Wizard dialog box, only I need to bring in info from three tables, not two. Basically, I have joined three tables, and the one table is linked to both, respectively by their pkey id’s.
Please advise with step-by-step details. How would I add a third table? Thanks much in advance.