C#

byte [] bytes = new byte[160];
FillBytes(ref bytes);
System.Net.IPAddress ipaddress = new System.Net.IPAddress(1684300900);  //=100.100.100.100
System.Net.IPEndPoint ipendpoint = new System.Net.IPEndPoint(ipaddress, 7000);
//System.Net.IPEndPoint remoteendpoint = new System.Net.IPEndPoint(ipaddress, 7001);
udpclient = new UdpClient();
try{
    int sent  = 0;
    //udpclient.Connect(ipendpoint);
    //udpclient.EnableBroadcast = true;
        //udpclient.Client.Connect(ipendpoint);
    //udpclient.Connect(ipendpoint);
    //sent = udpclient.Send(bytes, bytes.Length);
    sent = udpclient.Send(bytes, bytes.Length, SystemInformation.ComputerName, 7000);
    MessageBox.Show(Encoding.ASCII.GetString(bytes));
    //sent = udpclient.Send(bytes, bytes.Length, ipendpoint);
    lbl_bytessent.Text = "Sent: " + sent;
    //udpclient.Client.Close();
}
catch(Exception ex){
    MessageBox.Show("send result: error: " + ex.Message);
}

PS: I left the comments to show what I've already tried