Membuat Stopwatch with Visual Basic :)

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Diagnostics;

namespace stopwatch

{

    public partial class Form1 : Form

    {

        private Stopwatch stopw = null;

        public Form1()

        {

            InitializeComponent();

        }

        private void label1_Click(object sender, EventArgs e)

        {

        }

        private void button1_Click(object sender, EventArgs e)

        {

            stopw = new Stopwatch();

            stopw.Start();

            button1.Enabled = false;

        }

        private void timer1_Tick(object sender, EventArgs e)

        {

            if (stopw != null)

            {

                label1.Text = stopw.Elapsed.ToString(@"hh\:mm\:ss");

            }

        }

        private void button2_Click(object sender, EventArgs e)

        {

            stopw.Stop();

            button1.Enabled = true;

        }

    }

}