Without the use of a third-party piracy product such as Armadillo, the record locking is a fairly sound approach (sort of a record mutex/semaphore) and has been used in more than a few VFP applications.

>Are there any ways to detect if an application is being run multiple times from a Terminal Server/Citrix perspective? Especially if the application has been installed in multiple folders?
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>There are a variety of techniques for detecting if an application is already running on a workstation, but I don't think any of these techniques apply to the virtual workstation environment of a Terminal Server setup?
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>The only solution I can think of is to have the app detect when its being run under Terminal Services update a shared table used to track simultanous users (lock a record for every instance of an app that's running).
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>My question is motivated by a customer's concern that their application doesn't get placed in a Terminal Server environment and abused from a licensing use perspective.
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>Any thoughts appreciated.
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>Malcolm