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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            textBox1 = "";
            button2.Enabled = false;
            button3.Enabled = false;
        }

        int h = 0;
        int m = 0;
        int s = 0;
        int ms = 0;//毫秒

        private void button3_Click(object sender, EventArgs e)//结束按钮
        {
            timer1.Enabled = false;
            button1.Enabled = true;
            button2.Enabled = false;
            button3.Enabled = false;

            textBox1.Text = "";
            listBox1.Items.Clear();
        }

        private void button1_Click_1(object sender, EventArgs e)//开始按钮
        {
            textBox1 = "0:0.0 0";
            listBox1.Items.Clear();
            timer1.Enabled = true;
            button1.Enabled = false;
            button2.Enabled = true;
            button3.Enabled = true;
        }

        private void button2_Click_1(object sender, EventArgs e)//记录按钮
        {
            listBox1.Items.Add(textBox1.text);
        }

        private void timer1_Tick_1(object sender, EventArgs e)//时钟控件，频率为 1 毫秒
        {
            if (ms < 999)
                ms++;
            else
            {
                ms = 0;
                if (s < 59)
                    s++;
                else
                {
                    s = 0;
                    if (m < 59)
                        m++;
                    else
                    {
                        m = 0;
                        h++;
                    }
                }
            }

            textBox1.Text = "" + h + ":" + m + "." + s + " " + ms + "";//小时： 分. 秒 毫秒
        }

    }
}