>>Is there a way of determining if an exe is being used? The exe resides and is ran from a server.
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>You can use LLFF FOPEN() to see if you can open the file for write access.
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>nHandle = FOPEN("\\server\share\your.EXE",2)
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>If nHandle is -1, it's running.
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>Be sure to FCLOSE() it if you don't get an error or -1 on the FOPEN().

I'm not sure this would work, in the general case. It's not a requirement that, after you invoke an .EXE, the running process keeps its on-disk .EXE file open. It may be what actually happens with, say, a VFP .EXE but the OP didn't say what type of .EXE it is.

I'd think querying the list of running processes would be more reliable. For the local machine this shouldn't be too hard (parse the output of TASKLIST /SVC, there are probably myriad other more elegant ways). For a remote machine, more challenging. However, IIRC Hugo Ranea illustrated some way to do this via WMI, assuming the user has sufficient privileges or can input admin credentials in a RunAs.