the Enabled property of the textbox to false but
the problem is internet explorer do not show scroll
bar for the textbox content.but hopefully i found
the solution by setting the ReadOnly property to true -
<asp:TextBox ID="items" ReadOnly="true" Rows="7"
Font-Size="10" CssClass="textbox" BorderColor="White"
BorderWidth="1px" TextMode="MultiLine" runat="server"
Text='<%# Eval("desc") %>' ></asp:TextBox>