Threading and UI

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

namespace AsynchTask
{
	/// <summary>
	/// Summary description for Form1.
	/// </summary>
	public class frmCalculations : System.Windows.Forms.Form
	{
  Task Task1;
  private System.Windows.Forms.Label lblRunLoops;
  private System.Windows.Forms.Button btnRunLoops;
  private System.Windows.Forms.TextBox txtValue;
  private System.Windows.Forms.Label label1;
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

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

   Task1 = new Task();
   Task1.LoopComplete += new Task.LoopCompleteHandler(this.LoopDoneHandler);
		}

		/// <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.lblRunLoops = new System.Windows.Forms.Label();
   this.btnRunLoops = new System.Windows.Forms.Button();
   this.txtValue = new System.Windows.Forms.TextBox();
   this.label1 = new System.Windows.Forms.Label();
   this.SuspendLayout();
   // 
   // lblRunLoops
   // 
   this.lblRunLoops.Location = new System.Drawing.Point(128, 64);
   this.lblRunLoops.Name = "lblRunLoops";
   this.lblRunLoops.Size = new System.Drawing.Size(104, 23);
   this.lblRunLoops.TabIndex = 3;
   // 
   // btnRunLoops
   // 
   this.btnRunLoops.Location = new System.Drawing.Point(16, 64);
   this.btnRunLoops.Name = "btnRunLoops";
   this.btnRunLoops.Size = new System.Drawing.Size(104, 23);
   this.btnRunLoops.TabIndex = 8;
   this.btnRunLoops.Text = "Run a Loop";
   this.btnRunLoops.Click += new System.EventHandler(this.btnRunLoops_Click);
   // 
   // txtValue
   // 
   this.txtValue.Location = new System.Drawing.Point(16, 40);
   this.txtValue.Name = "txtValue";
   this.txtValue.TabIndex = 9;
   this.txtValue.Text = "";
   // 
   // label1
   // 
   this.label1.Font = new System.Drawing.Font("Trebuchet MS", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
   this.label1.ForeColor = System.Drawing.Color.MediumBlue;
   this.label1.Location = new System.Drawing.Point(16, 16);
   this.label1.Name = "label1";
   this.label1.Size = new System.Drawing.Size(280, 16);
   this.label1.TabIndex = 10;
   this.label1.Text = "Enter the number of loops to run in the text box below.";
   // 
   // frmCalculations
   // 
   this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
   this.ClientSize = new System.Drawing.Size(336, 101);
   this.Controls.Add(this.label1);
   this.Controls.Add(this.txtValue);
   this.Controls.Add(this.btnRunLoops);
   this.Controls.Add(this.lblRunLoops);
   this.Name = "frmCalculations";
   this.Text = "frmCalculations";
   this.ResumeLayout(false);

  }
		#endregion

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

  private void btnRunLoops_Click(object sender, System.EventArgs e)
  {
   Task1.varLoopValue = int.Parse(txtValue.Text);
   btnRunLoops.Enabled = false;
   lblRunLoops.Text = "Looping...";

   Task1.StartTask();
  }

  protected void LoopDoneHandler(double Calculations, int Count)
  {
   lblRunLoops.Text = Count.ToString();
   btnRunLoops.Enabled = true;
  }
 
	}
}