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 test : Form
    {
        public test()
        {
            InitializeComponent();
       
        }


        private void Form1_Load(object sender, EventArgs e)
        {
            lijst1.Items.Add(1);
            lijst1.Items.Add(2);

            lijst2.Items.Add(1);
            lijst2.Items.Add(2);
        }

        private void list1_SelectedIndexChanged(object sender, EventArgs e)
        {

        }

        private void cmdplus_Click(object sender, EventArgs e)
        {
            int eerste;
            int tweede;

            lijst1.SelectedItem = eerste;
            lijst2.SelectedItem = tweede;

            lblantwoord.Text = eerste + tweede;

        }
    }
}