There is plenty of information about locking on this site, try using the search box at the top of the page. My favourite is KM's RE: File Locking, which works for plain files and for DB's which don't have locking capabilities, which I believe include GDB and the likes (and yes, I know if it does not support locking it should not claim to be a DB ;--)

In reply to Re: Locking a DB by mirod
in thread Locking a DB by chaskins

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