>Looks like I can't do it. As soon as I put the little by @ sign in front of a parameter the form gives me a syntax error.

In a DO (form or just a procedure) you pass by reference like:

DO FORM WITH MyVar

so you don't need anything special to pass by arrays. To pass something to a form or prg using DO by Value, you do:

DO FORM WITH (MyVar)

So just get rid of the little @