>I know how to create my own UDF and place it in the DELETE TRIGGER for a table. It tests for child records and IF FOUND(), throws up a messagebox() w/ an OK button. However, when I RETURN .F. to the TRIGGER in order to prevent the delete, I still get the VFP generated messagebox() w/ "Trigger Failed". How can I return a false value yet suppress the VFP message ? Or, am I going about this all wrong ??
>Any help would be appreciated.

A failed trigger is still a VFP error. To suppress tehe VFP message, you need to catch with an error handler.