Wince C#调用ping

using System; 
using System.Drawing; 
using System.Collections; 
using System.Windows.Forms; 
using System.Net; 
using System.Net.Sockets; 
using System.Runtime.InteropServices; 
using System.Text; 
//Download by http://www.codefans.net 
namespace Ping 
{ 
    /// <summary> 
    /// Summary description for Form1. 
    /// </summary> 
    public class Form1 : System.Windows.Forms.Form 
    { 
        #region Form Data 
        private System.Windows.Forms.TextBox txtHost; 
        private System.Windows.Forms.Label lblHost; 
        private System.Windows.Forms.ListBox listBox1; 
        private System.Windows.Forms.Button btnPing; 
        private System.Windows.Forms.NumericUpDown udCount; 
        private System.Windows.Forms.Label label1; 
        private System.Windows.Forms.Label label2; 
        private System.Windows.Forms.MainMenu mainMenu1; 
        #endregion 
 
        public Form1() 
        { 
            // 
            // Required for Windows Form Designer support 
            // 
            InitializeComponent(); 
 
            txtHost.Text = "www.yahoo.com"; 
        } 
        /// <summary> 
        /// Clean up any resources being used. 
        /// </summary> 
        protected override void Dispose( bool disposing ) 
        { 
            base.Dispose( disposing ); 
        } 
        #region Windows Form Designer generated code 
        /// <summary> 
        /// Required method for Designer support - do not modify 
        /// the contents of this method with the code editor. 
        /// </summary> 
        private void InitializeComponent() 
        { 
            this.mainMenu1 = new System.Windows.Forms.MainMenu(); 
            this.txtHost = new System.Windows.Forms.TextBox(); 
            this.btnPing = new System.Windows.Forms.Button(); 
            this.lblHost = new System.Windows.Forms.Label(); 
            this.listBox1 = new System.Windows.Forms.ListBox(); 
            this.udCount = new System.Windows.Forms.NumericUpDown(); 
            this.label1 = new System.Windows.Forms.Label(); 
            this.label2 = new System.Windows.Forms.Label(); 
            //  
            // txtHost 
            //  
            this.txtHost.Location = new System.Drawing.Point(40, 16); 
            this.txtHost.Text = "192.168.0.2"; 
            //  
            // btnPing 
            //  
            this.btnPing.Location = new System.Drawing.Point(168, 40); 
            this.btnPing.Size = new System.Drawing.Size(64, 20); 
            this.btnPing.Text = "Ping"; 
            this.btnPing.Click += new System.EventHandler(this.btnPing_Click); 
            //  
            // lblHost 
            //  
            this.lblHost.Location = new System.Drawing.Point(144, 16); 
            this.lblHost.Size = new System.Drawing.Size(96, 20); 
            //  
            // listBox1 
            //  
            this.listBox1.Location = new System.Drawing.Point(0, 72); 
            this.listBox1.Size = new System.Drawing.Size(240, 170); 
            //  
            // udCount 
            //  
            this.udCount.Location = new System.Drawing.Point(48, 40); 
            this.udCount.Minimum = new System.Decimal(new int[] { 
                                                                    1, 
                                                                    0, 
                                                                    0, 
                                                                    0}); 
            this.udCount.Size = new System.Drawing.Size(48, 20); 
            this.udCount.Value = new System.Decimal(new int[] { 
                                                                  4, 
                                                                  0, 
                                                                  0, 
                                                                  0}); 
            //  
            // label1 
            //  
            this.label1.Location = new System.Drawing.Point(0, 16); 
            this.label1.Size = new System.Drawing.Size(32, 20); 
            this.label1.Text = "Addr:"; 
            //  
            // label2 
            //  
            this.label2.Location = new System.Drawing.Point(0, 40); 
            this.label2.Size = new System.Drawing.Size(40, 20); 
            this.label2.Text = "Count:"; 
            //  
            // Form1 
            //  
            this.Controls.Add(this.label2); 
            this.Controls.Add(this.label1); 
            this.Controls.Add(this.udCount); 
            this.Controls.Add(this.listBox1); 
            this.Controls.Add(this.lblHost); 
            this.Controls.Add(this.btnPing); 
            this.Controls.Add(this.txtHost); 
            this.Menu = this.mainMenu1; 
            this.MinimizeBox = false; 
            this.Text = "Form1"; 
 
        } 
        #endregion 
 
        /// <summary> 
        /// The main entry point for the application. 
        /// </summary> 
 
        static void Main()  
        { 
            Application.Run(new Form1()); 
        } 
 
        private void btnPing_Click(object sender, System.EventArgs e) 
        { 
            string addr = txtHost.Text; 
            IPHostEntry entry = null; 
            try 
            { 
                entry = Dns.GetHostByName(addr); 
            } 
            catch( SocketException ) 
            { 
            } 
            if (entry==null || entry.AddressList.Length == 0) 
            { 
                MessageBox.Show("Could not resolve " + addr); 
                txtHost.Focus(); 
                return; 
            } 
            lblHost.Text = entry.AddressList[0].ToString(); 
 
            byte[] RequestData = Encoding.ASCII.GetBytes( new string('\0', 64) ); 
 
            //Allocate ICMP_ECHO_REPLY structure 
            ICMP_ECHO_REPLY reply = new ICMP_ECHO_REPLY(255); 
            reply.DataSize = 255; 
            IntPtr pData = LocalAlloc(LMEM_ZEROINIT, reply.DataSize); 
            reply.Data = pData; 
            IntPtr h = IcmpCreateFile(); 
            uint ipaddr = (uint)entry.AddressList[0].Address; 
            listBox1.Items.Clear(); 
            for ( int i = 0; i < (int)udCount.Value; i++ ) 
            { 
                uint ret = IcmpSendEcho(h, ipaddr, RequestData, (short)RequestData.Length, IntPtr.Zero, reply._Data, reply._Data.Length, 1000); 
                int dwErr = 0; 
                if ( ret == 0 ) 
                { 
                    dwErr = GetLastError(); 
                    if ( dwErr != 11010 ) // If error is other than timeout - display a message 
                        MessageBox.Show("Failed to ping. Error code: " + dwErr.ToString()); 
                } 
                if ( dwErr != 11010 ) 
                    listBox1.Items.Add(string.Format("RTT: {0}, Data Size: {1}; TTL: {2}", reply.RoundTripTime, reply.DataSize, reply.Ttl)); 
                else 
                    listBox1.Items.Add("Request timed out"); 
                listBox1.SelectedIndex = listBox1.Items.Count - 1; 
                Application.DoEvents(); 
                System.Threading.Thread.Sleep(100); 
            } 
            IcmpCloseHandle(h); 
            LocalFree(reply.Data); 
 
        } 
 
        #region Memory Management 
        [DllImport("coredll")] 
        extern public static IntPtr LocalAlloc(int flags, int size); 
        [DllImport("coredll")] 
        extern public static IntPtr LocalFree(IntPtr pMem); 
 
        const int LMEM_ZEROINIT = 0x40; 
 
        #endregion 
 
 
        #region IPHLPAPI P/Invokes 
        [DllImport("iphlpapi")] 
        extern public static IntPtr IcmpCreateFile (); 
 
        [DllImport("iphlpapi")] 
        extern public static bool IcmpCloseHandle(IntPtr h); 
 
        [DllImport("iphlpapi")] 
        extern public static uint IcmpSendEcho( 
                         IntPtr IcmpHandle,  
                         uint DestinationAddress, 
                         byte[] RequestData,  
                         short RequestSize,  
                         IntPtr /*IP_OPTION_INFORMATION*/ RequestOptions,  
                         byte[] ReplyBuffer, 
                         int ReplySize,  
                         int Timeout );  
 
        #endregion 
 
        [DllImport("coredll")] 
        extern static int GetLastError(); 
    } 
 
 
 
    public class ICMP_ECHO_REPLY  
    { 
        public ICMP_ECHO_REPLY(int size) { data = new byte[size]; } 
        byte[] data; 
        public byte[] _Data { get { return data; } } 
        public int Address { get { return BitConverter.ToInt32(data, 0); } } 
        public int Status { get { return BitConverter.ToInt32(data, 4); } } 
        public int RoundTripTime  { get { return BitConverter.ToInt32(data, 8); } }  
        public short DataSize  { get { return BitConverter.ToInt16(data, 0xc); }  set { BitConverter.GetBytes( value ).CopyTo(data, 0xc);} } 
        public IntPtr Data { get { return new IntPtr(BitConverter.ToInt32(data, 0x10)); }  set { BitConverter.GetBytes( value.ToInt32() ).CopyTo(data, 0x10);} }  
        public byte Ttl {get { return data[0x14]; } } 
        public byte Tos {get { return data[0x15]; } } 
        public byte Flags {get { return data[0x16]; } } 
        public byte OptionsSize {get { return data[0x17]; } } 
        public IntPtr OptionsData { get { return new IntPtr(BitConverter.ToInt32(data, 0x18)); }  set { BitConverter.GetBytes( value.ToInt32() ).CopyTo(data, 0x18);} }  
    } 
 
}