How to use progressbarcontrol in setupform in c#?

Drag a ProgressBar onto the Form. When you need to set a new progress percentage, set the ProgressBar's Value property.

You may find it better to use a BackgroundWorker to do the 'set up' in it's DoWork event handler. Set it's WorkerReportsProgress property to true and handle it's ProgressChanged event.

When you need to update the progress, call the BackgroundWorker's ReportProgress method and in the handler update the ProgressBar

using System;
using System.ComponentModel;
using System.Threading;
using System.Windows.Forms;
public partial class FormSetUp : Form
{
    BackgroundWorker backgroundWorker;
    ProgressBar progressBar;
    public FormSetUp()
    {
        InitializeComponent();
        Shown += new EventHandler(FormSetUp_Shown);
        backgroundWorker = new BackgroundWorker();
        backgroundWorker.WorkerReportsProgress = true;
        backgroundWorker.DoWork += new DoWorkEventHandler(
            backgroundWorker_DoWork);
        backgroundWorker.ProgressChanged += new ProgressChangedEventHandler(
            backgroundWorker_ProgressChanged);
        backgroundWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(
            backgroundWorker_RunWorkerCompleted);
        progressBar = new ProgressBar();
        Controls.Add(progressBar);
    }
    void FormSetUp_Shown(object sender, EventArgs e)
    {
        backgroundWorker.RunWorkerAsync();
    }
    void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
    {
        int percentage = 0;
        backgroundWorker.ReportProgress(percentage);
        // Do something
        Thread.Sleep(1000); // Simulate work
        percentage += 50;
        backgroundWorker.ReportProgress(percentage);
        // Do something else
        Thread.Sleep(1000); // Simulate work
        percentage += 50;
        backgroundWorker.ReportProgress(percentage);
        Thread.Sleep(1000);
    }
    void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        progressBar.Value = e.ProgressPercentage;
    }
    void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        Close();
    }
}