Oracle designer web application: NO DATA FOUND if no record returned

Hi, Friends:
We use oracle designer 6i to generate web applicaion. Is there methods to popup message box like 'NO DATA FOUND' when click search or submit button from screen?Oracle web server generator automatically generate lots packages and functions like function QueryHits, it returns the number of record, my question is how can I catch this paremeter from designer module or module components before code generation? what kind parameter do I need to define and passe to Designer so that Oracle web server generator knows this parameter at generating time or run time?
Thanks
Brian

For displaying messages you can use On-Message trigger attached to the form. In the Forms on-line help you can find also a good example - "On-Message Trigger" topic.
In Designer this trigger is created at module level (Application logic-Events).
I hope this will help you.

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