How To ReportViewer Modify Header From Form?

I would like to have several header lines that would change for a specific report based on a person's name and date.

In one case, I might want header lines:

Dave

8/16/2012

In another case, I might want header lines:

George

7/20/2012

I know that I can put a textbox above the tablix as well as in the header space, but I don't see how I can change the text in the textboxes in runtime. In my form the ReportViewer object is ReportViewer1, but I don't see a property that allows me to change any of the textboxes from the form that contains the report.

The data that I am using is in a business object.

Thank you for your assistance.

Dave

Dave Kaufmann