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

namespace login
{
    public partial class aboutus : Form
    {
        public aboutus()
        {
            InitializeComponent();
        }

        private void about_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {

            if (MessageBox.Show("確實要退出系統嗎?", "詢問", MessageBoxButtons.YesNo) == DialogResult.Yes)
            {
                Application.Exit();
            }
        }
        
    }
}