I had someone ask me this question and I did not know the answer.

A single computer has multiple copies of VFP running. Now we like to know all the VFP programs that are running under each session. The reason for this was that the same program was running on two instances of the same PC.

Sounds like an API call could identify the VFP sessions, but not sure about interrogating what each session is running. Sounds like a challenging question...