>I want to know, in VFP, which users are currently running an
>application. I would want to return the userid via SYS(0).
>
>Anyone have any ideas?

Yes! See QuitApp in the download area by Greg Reichert. I also have a modified version of this that I would gladly share, but you must get Greg's permission first. I give him credit for his portions in the code so he may not mind.