Progress

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace control9
{
    public partial class Form1 : Form
    {
        Int32 MaxTime = 10000;
        Int32 TimeStep = 100;
        Int32 TimeLeft = 0;
        bool stopped = false;
        public Form1()
        {
            InitializeComponent();
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
            TimeLeft -= timer1.Interval;
            if ((TimeLeft < TimeStep)||(stopped))
                Stop();
            else
                progressBar1.Value += 1;
        }
        private void button1_Click(object sender, EventArgs e)
        {
            // start button
            Start();
        }
        private void button2_Click(object sender, EventArgs e)
        {
            // stopp button
            stopped = true;
        }
        private void Start()
        {
            TimeLeft = MaxTime;
            timer1.Interval = TimeStep;
            button1.Hide();
            button2.Show();
            progressBar1.Maximum = MaxTime/TimeStep;
            progressBar1.Minimum = 0;
            progressBar1.Value = 0;
            progressBar1.Show();
            stopped = false;
            timer1.Enabled = true;
        }
        private void Stop()
        {
            timer1.Enabled = false;
            button1.Show();
            button2.Hide();
            progressBar1.Hide();
        }
    }
}