Hmmm...

That may not be so easy.
If what you are doing is to build a query similar to this:
SELECT * FROM MyTable WHERE myDescField Like "*" & [Enter text Here] & "*";
and trapping the NO DATA Event in the report, that may not be so easy to do.
I don't know if you can use the report's object model to retrieve that
dynamically generated Query Parameter value.

If that is the functionality you require, then you may have to change how
you do things entirely.

You may need to open a form or run some code to feed the reprt its query and
its prompt text via the docmd.openreport method call (you can supply the
parameter as the OpenArgs parameter value (or as part of it) and you can the
add some code to your NODATA event to retrieve and use the me.openargs value
(if present).