show msg to user in scrip

David Schmidt <[email protected]>
Newsgroups gmane.comp.bug-tracking.request-tracker.user
Message-ID <[email protected]> 
Hello list

I want to write a scrip that aborts the action the user is trying to 
commit and redisplay the current page with an added info message. How 
can i display an info message to the user?

regards
david
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