>>>I just implemented some data encryption using VfpEncryption71.fll. It seems to work fine, but when I close the application, I get an error "API call caused an exception." I believe it is on the line of code that says "SET LIBRARY TO." Any ideas?
>>
>>Just put the whole code in try/catch block and ignore this error. You can also retry if you get this error.
>
>But why does it happen? Can I make it stop?

Not really, AFAIK. It's intermittent problem hard to find, that can be safely ignored.

I vaguely remember having the same problem long, long time ago and Sergey suggesting some MS KB that solved the issue for us then.