Eventhandlere

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

namespace WindowsFormsApplication138
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void btnKnap_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right) MessageBox.Show("Højre");
            if (e.Button == MouseButtons.Left) MessageBox.Show("VEnstre");

        }
    }
}