C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Windows.Forms;
using System.Drawing;

namespace Thread191
{
   class  Listing191AND192 : Form 
   {
     // Label lblInfo = new Label();
      Label lblInfo2 = new Label();
      Button btStart = new Button();

      public Listing191AND192()
      {
         Thread currThread = Thread.CurrentThread;
         
         lblInfo2.Location = new Point(15, 10);
         lblInfo2.Size = new Size(300, 100);
         lblInfo2.Text = "Hi";
         currThread.Name = "Main thread";
         btStart.Location = new Point(300, 340);
         btStart.Text = "Start";
         btStart.Click += new EventHandler(this.StartIt);

         this.Text = "Listing191";
         //this.Controls.Add(lblInfo);
         this.Controls.Add(lblInfo2);
         this.Controls.Add(btStart);
         this.Size = new Size(800, 600);
      }

      void StartIt(object sender, EventArgs e)
      {
         lblInfo2.Text = "Thread 2 started from " + Thread.CurrentThread.Name + "...\n";

         Thread thdTest = new Thread(new ThreadStart(DoIt));
         thdTest.Name = "Thread 2";
         thdTest.Start();
         lblInfo2.Text += Thread.CurrentThread.Name + " sleepin....\n";
         Thread.Sleep(2000);
         lblInfo2.Text += Thread.CurrentThread.Name + " waking...\n";
         thdTest.Join();

         lblInfo2.Text += "Thread 2 ended...\n";
      }

      void DoIt()
      {
         Thread.Sleep(1000);
         MessageBox.Show(Thread.CurrentThread.Name);
         lblInfo2.Text += "Hello from " + Thread.CurrentThread.Name + "\n";
      }
      static void Main(string[] args)
      {
         Application.Run(new Listing191AND192());

         
      }
   }
}