How this Asp.Net page will work please explain:

Computer Science
Price: $15 USD

Question description For example, there are user controls on this code which I am sending you, how are these user controls being called when the page loads ?

Here is code:

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="PRC_Default" ValidateRequest="false"%>
<%@ Register Src="includes/footer.ascx" TagName="footer" TagPrefix="uc3" %>
<%@ Register Src="includes/menu.ascx" TagName="menu" TagPrefix="uc2" %>
<%@ Register Src="../includes/header2.ascx" TagName="header" TagPrefix="uc1" %>
<%@ Register Src="includes/menufooter.ascx" TagName="menufooter" TagPrefix="uc4" %>
<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
<!DOCTYPE html PUBLIC "-//W3C//Dtd Xhtml 1.0 Transitional//EN" "">
<html xmlns="">
<head runat="server">
<title>Premier Resource Center</title>
<link rel="stylesheet" type="text/css" href="../styles.css" />
<body style="margin: 0px;">
<form id="form1" runat="server">
<div id="divloggedout" runat="Server" visible="false">
Your session has timed-out. <a href="../login.aspx">Click here to login</a>
<div id="divunauthorized" runat="Server" visible="false">
You are not authorized to access this application.
<div id="divloggedin" runat="Server" visible="true" style="margin: 0px; width: 100%;">
<uc1:header ID="Fred" runat="server" />
<table cellpadding="0" cellspacing="0" border="0" width="100%">
<td id="td_menu" runat="server" rowspan="3" width="180" valign="top" bgcolor="#e8e8e8">
<asp:PlaceHolder ID="phMenu" runat="server" />
<td width="*" valign="top" colspan="2">
<asp:PlaceHolder ID="phBody" runat="server" />
<td valign="top" align="center" colspan="2">
<asp:Label ID="lblMessage" runat="server" CssClass="bodyTextCenter" /><br />
<asp:Label ID="lblError" runat="server" CssClass="required" />
<uc3:footer ID="Footer1" runat="server" />

Tutor Answer

(Top Tutor) Daniel C.
School: Boston College
Studypool has helped 1,244,100 students
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1827 tutors are online

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors