TSmartProgressBar: A Smart C# ProgressBar with Percent Text

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

namespace CSUST.Data
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            int delay = (int)numericUpDown1.Value;
            tProgressBar1.Value = 0;
            for (int k = 0; k <= 100; k++)
            {
                tProgressBar1.Value = k;
                System.Threading.Thread.Sleep(delay);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            propertyGrid1.SelectedObject = tProgressBar1;

        }

        private void button2_Click_1(object sender, EventArgs e)
        {
            tProgressBar1.Value = 0;
        }

        private void label1_Click(object sender, EventArgs e)
        {
            CSUST.Data.TSmartProgressBar bar = new CSUST.Data.TSmartProgressBar();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            Type t = typeof(ProgressBar);
            MessageBox.Show(t.IsSealed.ToString());
        }
    }
}