การบ้านครั้งที่ 8

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;

namespace WindowsFormsApplication13

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void list1_SeletedIndexChanged(objectsender, EventArgs e)

        {

            int index = list1.SelectedIndex;

            display.Text = list1.Items[index].ToString();

        }

        private void list2_SelectedIndexChanged(objectsender, EventArgs e) {

            int index = list2.SelectedIndex;

            display.Text = list2.Items[index].ToString();

        }

    }

}