Hi Richard,
when you don't know , which exact user exit you are looking for, or which user exit, is your requirement.
To know this, we do as what i told you earlier, because if you put a hard coded, breakpoint, and execute your standard transaction, then it will stops for each moment for which it has been specified
for, so what i told you earlier, is the method. when you don't know about the behaviour of any user exit.
I hope it clarifies your query, if not you can feel free to ask me again, no problem at all.