这里我给大家提供一个很实用的例子，就是在线发送ICQ信息。想一想我们在网页上直接给朋友发送ICQ信息，那是多么美妙的事情啊。呵呵，在吹牛啊，其实ICQ本来就有在线发送的代码，不过，这些都是AOL给你写好的代码，多没有意思啊。还是自已写的比较好，呵呵,废话少说，大家来看代码吧
  
  <% @ Page Language="C#" %>
  <% @ Assembly Name="System.Net" %>
  <% @ Import Namespace="System.Net" %>
  <% @ Import Namespace="System.Net.Sockets" %>
  <% @ Import Namespace="System.IO" %>
  <% @ Import Namespace="System.Text" %>
  
  <Script Language="C#" Runat="Server">
  public void Page_Load(Object src,EventArgs e)
  {
   ICQ_Show.Text="如果提交后，在这里显示信息";
  }
  
  public void Send_Click(Object sender,EventArgs e)
  {
   string sendmsg;
   string commandmsg;
   //首先取得要发送的信息
   commandmsg = "from="+ICQ_Name.Text+"&fromemail="+ICQ_Email.Text+"&subject=";
   commandmsg += ICQ_Subject.Text+"&body="+ICQ_Message.Text+"&to="+ICQ_Number.Text
   commandmsg += "&Send=Send+Message";
   //然后就是组装全部的信息
   sendmsg="POST /scripts/WWPMsg.dll HTTP/1.1\r\n";
   sendmsg += "Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg,";
   sendmsg += " application/vnd.ms-excel,";
   sendmsg += " application/msword, application/vnd.ms-powerpoint, */*\r\n";
   sendmsg += "Accept-Language: zh-cn\r\n";
   sendmsg += "Content-Type: application/x-www-form-urlencoded\r\n";
   sendmsg += "Accept-Encoding: gzip, deflate\r\n";
   sendmsg += "User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows 95)\r\n";
   sendmsg += "Host: wwp.icq.com\r\n";
   sendmsg += "Content-Length: " + commandmsg.Length + "\r\n";
   sendmsg += "Connection: Keep-Alive\r\n\r\n";
   sendmsg += commandmsg + "\r\n\r\n";
  
   Byte[] arrMsg=Encoding.Default.GetBytes(sendmsg.ToCharArray());
   //需要发送的信息处理完毕
  
   //======下面就是发送这些信息=====
   //首先是建立一个TCPClient 对象