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Common file qualifier routines

Did you know there is a standard mechanism for implementing the common file selection qualifiers such as /EXCLUDE, /BEFORE, /SINCE, and so on? These are the UTIL$CQUAL_* routines, documented in the Utility Routines Manual.

I'd do an example here, but you can't get much better than the example in the documentation. If you are creating a utility that deals with user-selected file specs, you should definitely check out these routines.