Using ToolTip : ToolTip « ASP.net Controls « ASP.NET Tutorial

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Buttons</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h1>Button Controls</h1>

     <asp:Button ID="btnLink" runat="server" Text="Link To Target Page" 
        ToolTip="Click here to go to the target page." OnClick="btnLink_Click" />
     <asp:ImageButton ID="imgLink" runat="server" 
        AlternateText="Link to Target Page" 
        ImageUrl="Dan at Vernal Pool.jpg" 
        ToolTip="Click here to go to the target page." OnClick="imgLink_Click" />
     <asp:LinkButton ID="lnkLink" runat="server"
        ToolTip="Click here to go to the target page." 
        Font-Name="Comic Sans MS Bold"
        Font-Size="16pt" OnClick="btnLink_Click">
        LinkButton To Target Page</asp:LinkButton>
    </div>
    </form>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page 
{
   protected void btnLink_Click(object sender, EventArgs e){
       Response.Redirect("TargetPage.aspx");
    }
   protected void imgLink_Click(object sender, ImageClickEventArgs e)
   {
     Response.Redirect("TargetPage.aspx");
    }
 }
3.30.ToolTip
	3.30.1.	Using ToolTip