Viewing source for recipe0304cs.aspx
<%@ Register TagPrefix="AspNetCookbook" Namespace="AspNetCookbook" Assembly="RecipesCS" %>
<%@ Page Language="C#" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>03 Custom Controls - 04 Creating a Composite Control</title>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<P>Enter an email address (or leave blank):<BR>
<AspNetCookbook:EmailTextBox ID="EmailTextBox1" ErrorMessage="You must provide a valid e-mail address!" runat="server" /><br>
<asp:Button ID="SubmitButton" Runat="server" Text="Go" /></P>
</form>
</body>
</HTML>