private void InitializeComponent ( )
{
	this.button1 = new System.Windows.Forms.Button ( ) ;
	this.listBox1 = new System.Windows.Forms.ListBox ( ) ;
	this.statusBar1 = new System.Windows.Forms.StatusBar ( ) ;
	this.SuspendLayout ( ) ;
	this.button1.FlatStyle = System.Windows.Forms.FlatStyle.Flat ;
	this.button1.Location = new System.Drawing.Point ( 96 , 16 ) ;
	this.button1.Name = "button1" ;
	this.button1.Size = new System.Drawing.Size ( 80 , 34 ) ;
	this.button1.TabIndex = 0 ;
	this.button1.Text = "监听" ;
	this.button1.Click += new System.EventHandler ( this.button1_Click ) ;
	this.listBox1.ItemHeight = 12 ;
	this.listBox1.Location = new System.Drawing.Point ( 16 , 68 ) ;
	this.listBox1.Name = "listBox1" ;
	this.listBox1.Size = new System.Drawing.Size ( 258 , 172 ) ;
	this.listBox1.TabIndex = 1 ;
	this.statusBar1.Location = new System.Drawing.Point ( 0 , 251 ) ;
	this.statusBar1.Name = "statusBar1" ;
	this.statusBar1.Size = new System.Drawing.Size ( 292 , 22 ) ;
	this.statusBar1.TabIndex = 2 ;
	this.statusBar1.Text = "无连接" ;
	this.AutoScaleBaseSize = new System.Drawing.Size ( 6 , 14 ) ;
	this.ClientSize = new System.Drawing.Size ( 292 , 273 ) ;
	this.Controls.AddRange ( new System.Windows.Forms.Control[] {
		  this.statusBar1 ,
		  this.listBox1 ,
		  this.button1} ) ;
	this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle ;
	this.MaximizeBox = false ;
	this.Name = "Form1" ;
	this.Text = "利用Socket来接收数据" ;
	this.ResumeLayout ( false ) ;
}

using System ;
using System.Drawing ;
using System.Collections ;
using System.ComponentModel ;
using System.Windows.Forms ;
using System.Data ;
using System.Net.Sockets  ;
//使用到TcpListen类
using System.Net ;
using System.Threading  ;
//使用到线程

int port = 8000 ;
//定义侦听端口号
private Thread thThreadRead ;
//创建线程，用以侦听端口号，接收信息
private TcpListener	tlTcpListen ;
//侦听端口号
private bool blistener = true ;
//设定标示位，判断侦听状态
private Socket stRead ;