>Can I test multiple objects in one prg or I have to create a new program for each class? If my classes are in vcx, is it OK?

Regarding the first question, my practice is to have at least one test class (PRG) per class to test. I believe this is common practice, but, off the top of my head, cannot recall why I think so.

FoxUnit can test classes defined in both VCXs and PRGs.

Chris