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       private void btn_Start_Click(object sender, EventArgs e)
       {
           if (null != worker)
           {
               worker.Stop();
               worker = null;
           }
           worker = new Worker(PcanChannel.Usb01, Bitrate.Pcan500);
           worker.AllowEchoFrames = true; 
           worker.AllowErrorFrames = true;

           // Create Broadcast
           byte[] payload = { 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };

           PcanMessage message = new PcanMessage(
               id: 0xB9,
               msgType: MessageType.Echo,
               dlc: 8,
               data: payload);
           worker.AddBroadcast(message, 100);

           // Create event handler
           worker.MessageAvailable += OnMessageAvailable;
           worker.Start();
       }

       private void OnMessageAvailable(object sender, MessageAvailableEventArgs e)
       {
           msgCounter ++;
           label1.Text = msgCounter.ToString(); 
       }