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I have used cancel handlers and return handlers quite a bit to enforce certain rules. For example, if I write a procedure to support changing the current environment - say the library list, I register exits to restore no matter what happens. If you would like an example I can provide one. One thing to be aware of is that you cannot return anything or you will get an exception (it doesn't work like callp). David Morris >>> NSmith@lincare.com 02/22/02 08:24AM >>> Has anyone implemented a generic or set of Cancel and/or Condition Handlers to use across an entire application and what would such an animal look like? Is there a list somewhere of all possible conditions a handler can handle? I know, RTFM. At this point it's just a general question, not a real project I'm getting into.
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