Take a look at Who opened what files on the network? (modified to use only VFP code) FAQ #7896.

>I know you can use the used() function to see if a table is currently open by the user running the code, but is there any way to see if a free table is in use on a network by anyone on that network? If so, is there anything in VFP8 that will also tell you who is using the table?
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>Kev