DropShadow is an extender which applies a "Drop Shadow" to a Panel.

The aspx code is:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title>Ajax :: DropShadowExtender</title>

</head>

<body>

<form id="form1" runat="server">

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<div>

<table cellpadding="0" cellspacing="0" width="50%" align="center">

<tr>

<td>

<asp:Panel ID="PanelLoginControl" runat="server" Height="190px" Width="395px" BackColor="#00AEEF">

<div>

<table cellspacing="3" width="98%" align="center" style="margin: 0px 5px 0px 5px;">

<tr>

<td align="center" style="font-weight: bold;">

AJAX: A Good Control To Make Shadow around a panel

</td>

</tr>

</table>

</div>

</asp:Panel>

</td>

</tr>

</table>

</div>

<div>

<ajaxToolkit:DropShadowExtender ID="DSExtender" runat="server" Opacity="0.30" Radius="4"

Rounded="true" TargetControlID="PanelLoginControl">

</ajaxToolkit:DropShadowExtender>

</div>

</form>

</body>

</html>

When I run application


Figure 1.


Here If I change Property of ShadowExtender control like
Rounded="false" Then Result



Figure 2.

If I set

Opacity="0.90" Then Result



Figure 3.