[AccessD] Is it possible to change the filter for a report via input from a text box on the report itself?

We want to provide "filtering on the fly" for our users.

We have placed a Textbox on the report to obtain user input.

We cannot figure out how to grab the value of this textbox on the report
(via VBA code).

Looks like we are missing something.

Thanks for your help/advice.

Brad