using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

using System.Threading;

namespace Thread_Simple
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{

		Thread calcThread;

		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.Label label1;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Required for Windows Form Designer support
			//
			InitializeComponent();

			//
			// TODO: Add any constructor code after InitializeComponent call
			//
		}

		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{
			this.button1 = new System.Windows.Forms.Button();
			this.button2 = new System.Windows.Forms.Button();
			this.label1 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(88, 144);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(112, 23);
			this.button1.TabIndex = 0;
			this.button1.Text = "Start Computation";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// button2
			// 
			this.button2.Location = new System.Drawing.Point(80, 64);
			this.button2.Name = "button2";
			this.button2.Size = new System.Drawing.Size(144, 23);
			this.button2.TabIndex = 1;
			this.button2.Text = "Toggle Background color";
			this.button2.Click += new System.EventHandler(this.button2_Click);
			// 
			// label1
			// 
			this.label1.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D;
			this.label1.Location = new System.Drawing.Point(96, 184);
			this.label1.Name = "label1";
			this.label1.TabIndex = 2;
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.BackColor = System.Drawing.Color.Red;
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.AddRange(new System.Windows.Forms.Control[] {
																		  this.label1,
																		  this.button2,
																		  this.button1});
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button2_Click(object sender, System.EventArgs e)
		{
			if (this.BackColor == Color.Red)
				this.BackColor = Color.Green;
			else
				this.BackColor = Color.Red;
 		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			// start background thread to do the computation
			calcThread = new Thread(new ThreadStart(calcThreadFunction));
			calcThread.IsBackground = true;
			calcThread.Start();
		}

		void calcThreadFunction()
		{
			float x = 100.0f;
			float y = 200.0f;
			float z;
			for (int i=0; i<=10000; i++)
				for (int j= 0; j<=50000; j++)
					z = x*y/(x+y);
			label1.BackColor = Color.Blue;
			label1.Text = "All Done";
		}

	}
}