获取远程主机的MAC(转贴)

using System.Runtime.InteropServices;

  [DllImport("Iphlpapi.dll")]
  private static extern int SendARP(Int32 dest,Int32 host,ref Int64 mac,ref Int32 length);
  [DllImport("Ws2_32.dll")]
  private static extern Int32 inet_addr(string ip);

  static private Int64 getRemoteMAC(string localIP, string remoteIP)
  {
   Int32 ldest= inet_addr(remoteIP);        //远程主机ip
   Int32 lhost= inet_addr(localIP);            //本机ip

   try
   {
    Int64 macinfo = new Int64();
    Int32 len = 6;
    int res = SendARP(ldest,0, ref macinfo, ref len);
    return macinfo;
   }
   catch(Exception err)
   {
    Console.WriteLine("Error:{0}",err.Message);
   }
   return 0;
  }
---------------------------------