How to call ReportViewer Refresh method?

I have a web form with a textbox that contains a parameter for a report defined in the ReportViewer control. I want to refresh the report when the user clicks on my refresh button. I can't find the Refresh method. It works if I click on the reviewer's refresh button, but my users need to see that big button that says Refresh. Any ideas of how to call the refresh method? ThanksFound it.

Me.ReportViewer1.LocalReport.Refresh()