C#

private bool RunThread=true;
private delegate void ThreadMessageDelegate(string Mess);
private Thread MessageThread=null;
[STAThread]
static void Main() 
{
	Application.Run(new Form1());
}

private void LabelThread()
{
	if(lbThreadLabel.InvokeRequired)
		lbThreadLabel.Invoke(new ThreadMessageDelegate(ShowThreadMessage),new object [] {"Thread Started"});
	Thread.Sleep(1000);
	while(RunThread)
	{
		if(lbThreadLabel.InvokeRequired)
			lbThreadLabel.Invoke(new ThreadMessageDelegate(ShowThreadMessage),new object [] {null});
		Thread.Sleep(50);
	}
	if(lbThreadLabel.InvokeRequired)
        	lbThreadLabel.Invoke(new ThreadMessageDelegate(ShowThreadMessage),new object [] {"Thread Stoppped"});
}

private void ShowThreadMessage(string Mess)
{
	if(Mess==null)
		lbThreadLabel.Text=DateTime.Now.ToString();
	else
		lbThreadLabel.Text=Mess;
}
		
private void Form1_Load(object sender, System.EventArgs e)
{
	MessageThread = new Thread(new ThreadStart(LabelThread));
	//MessageThread.IsBackground=true;
}
		
private void runtimer_Tick(object sender, System.EventArgs e)
{
	switch (MessageThread.ThreadState)
	{
		case ThreadState.Running:
			lbThreadState.Text="Running";
			break;
		case ThreadState.Suspended:
			lbThreadState.Text="Suspended";
			break;
		case ThreadState.WaitSleepJoin:
			lbThreadState.Text="WaitSleepJoin";
			break;
		case ThreadState.Stopped:
			lbThreadState.Text="Stopped";
			break;
		case ThreadState.Unstarted:
			lbThreadState.Text="UnStarted";
			break;
		default:
			lbThreadState.Text="Unknown";
			break;
	}
}

private void btOK_Click(object sender, System.EventArgs e)
{
	MessageThread.Start();
}

private void btCancel_Click(object sender, System.EventArgs e)
{
	RunThread=false;
}

private void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
	RunThread=false;
	//MessageThread.Interrupt();
	MessageThread.Join();
}

byte[] message = new byte[40];
message[4] = (byte)'S';
message[5] = (byte)'S';
message[6] = (byte)'T';
message[7] = (byte)'A';
message[8] = (byte)'R';
message[9] = (byte)'T';
message[10] = (byte)'C';
message[11] = (byte)'S';
int retval = myStream1.Write(message);