How to use the progress bar in a windows form?
Drag down a progress bar, a button and a timer. Now click on the button and write the code:

private void btnprogress_Click(object sender, EventArgs e)
{
this.timer1.start();
}

Now double click on timer

private void timer1_Click(object sender, EventArgs e)
{
this.btnprogress.increment(1);
}

We can also control the speed of the interval by a timer property.