……

Here’s the code:

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

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
// This delegate enables asynchronous calls for setting
// the value property on a progressBar1 control.
delegate void SetProgressValue(int progress);

public Form1()
{
InitializeComponent();
}

private void button2_Click(object sender, EventArgs e)
{
Close();
}

// This method is passed in to the SetProgressValue delegate
// to set the Value property of progressBar1.
private void SetProgress(int progress)
{
this.progressBar1.Value = progress;
}

// This method starts BackgroundWorker1 by calling
// RunWorkerAsync.
private void button1_Click(object sender, EventArgs e)
{
this.backgroundWorker1.RunWorkerAsync();
}

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
for (int i=1; i<101; i++)
{
if (this.progressBar1.InvokeRequired)
{
// It's on a different thread, so use Invoke.
SetProgressValue v = new SetProgressValue(this.SetProgress);
this.Invoke(v, new object[] { i });
}
else
{
// It's on the same thread, no need for Invoke
this.progressBar1.Value = i;
}
Thread.Sleep(1000);
}
}

private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
MessageBox.Show("background work completed");
}

}
}
[/c-sharp]

Your can download full project based on Visual Studio 2008 from here