Hi, I searched the forms and I didn't find an answer.
Anyways, I have a form called 'Report Generator' in which I have a combo box called 'cmbLeadSource' in which the selections are 'Web, Phone, and Email'. I want the user to select one of the sources from the combo box and then click on a button to bring up a filtered query or report showing records that were sourced by the web (for instance) if the user selected 'Web' from cmbLeadSource.

Any help would be awesome. Thanks.

The title says listbox but you describe a combo. I mention it since it could change the answer. If it's a combo (or single select listbox), you can refer to it in the criteria of the query:

Forms!FormName.ComboName