private void Form1_Load(object sender, EventArgs e)
        {
            Tamir.IPLib.PcapDeviceList myDevices = Tamir.IPLib.SharpPcap.GetAllDevices();
            foreach (Tamir.IPLib.PcapDevice pcapdev in myDevices)
            this.comboBox1.Items.Add(pcapdev.PcapDescription);
            this.comboBox1.SelectedIndex = 1;         
            foreach(Tamir.IPLib.NetworkDevice
        }