Avoid multiple Process Bar when Re - executing

Question

I have a application in which I use a process bar which starts after I click Start button (Start button is disabled after I click ) and once the process is complete the start button is enabled.

when I click start again there are 2 process bars I just want one process bar every time I re- execute

 

 

 

http://i.imgur.com/F0bo4DP.jpg 

 

 http://i.imgur.com/1PSOCL6.jpg

 

 http://i.imgur.com/32mgPm3.jpg

 

button1.Enabled = false;

pBar = new ProgressBar(); // now assigning to field

Controls.Add(pBar);

pBar.Name = "ProgresBar1";

pBar.Dock = DockStyle.Bottom;

pBar.Style = ProgressBarStyle.Marquee;

pBar.MarqueeAnimationSpeed = 10;

pBar.Width = 100;

pBar.Height = 30;

pBar.Minimum = 0;

pBar.Maximum = 100;

pBar.Value = 100;

//-------------------------------------------------

System.Threading.Thread.Sleep(10000);

//--------Statements----------------------------------------

//------------------------------------------------

pBar.Style = ProgressBarStyle.Continuous;

pBar.MarqueeAnimationSpeed = 5;

button1.Enabled = true;