How do I use custom value in asp:TextBox Name attribute?

http://forums.asp.net/t/1692226.aspx?How+do+I+use+custom+value+in+asp+TextBox+Name+attribute+
The same problem?
<asp:TextBox runat="server" ID="UserName" ClientIDMode="Static" ></asp:TextBox> <input name="ctl00$HomePageMain$UserName" type="text" id="UserName"> How to output real NAME?