set nested control on a user control


I have a usercontrol UC1 that I want to use on a confirmation page and then use to send as an email. UC1 has a textbox on it: txtUserName. When the UC1 renders on my confirmation page, how can I dynamically access txtUserName and update it's value in codebehind?

Thanks in advance for the help,
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telliot79Author Commented:
figured it out:

            UserControl ctrl = (UserControl)LoadControl("~/_ControlTemplates/My Control.ascx");

            Image img = (Image)ctrl.FindControl("imgLogo");
            img.ImageUrl = "http://kyrhdevsp02/_controltemplates/cmsnotes/images/LOGODESIGN2015.jpg";

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