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Change background color for asp

<%@ Page Language=VB Debug=true %> <script runat=server> Sub lb1_Changed(Sender As Object, E As EventArgs)     lb1.BackColor = System.Drawing.Color.FromName(lb1.SelectedItem.Text) End Sub </SCRIPT> <HTML> <HEAD> <TITLE>Writing Code that Fires When the Selection Changes in a ListBox Control</TITLE> </HEAD> <form runat="server"> <BR><BR> Select a Color:<BR> <BR><BR> <asp:listbox id="lb1" runat="server" autopostback="True" onselectedindexchanged="lb1_Changed" rows=3>     <asp:listitem value="Bu">Blue</asp:listitem>     <asp:listitem value="Re">Red</asp:listitem>     <asp:listitem value="Gr">Green</asp:listitem>     <asp:listitem value="Pu" >Purple</asp:listitem>     <asp:listitem value="Ba">Black</asp:listitem> </asp:listbox> </form> </BODY> </HTML>