>>ID() is in the VFP7 help. Looks like it's the same as SYS(0).
>>
>>
>>>>What about them using something from the machine like SYS(0) or ID() to identify themselves?
>>>
>>>SYS(0) may not be unique across multiple domains or machines. And what is "ID()"?
>
>ID() works in VFP6, too. But you can't bring up any help for it. You get a "missing operand" if you try "HELP ID()" or a "missing expression" if you try "HELP ID". There's nothing in help for it, anyways.

Believe it or not, ID() also works in VFP 3.0b. It took MS four versions to update the help?!?!