Flere KeyDown events på samme tid

Kode 

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsApplication4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            // Dette eksempel ignorerer keys i modsatte retning! (men man kan naturligvis gøre hvad man har lyst til)
            
            bool left = GetAsyncKeyState((int)System.Windows.Forms.Keys.Left) < 0;
            bool right = GetAsyncKeyState((int)System.Windows.Forms.Keys.Right) < 0;
            bool up = GetAsyncKeyState((int)System.Windows.Forms.Keys.Up) < 0;
            bool down = GetAsyncKeyState((int)System.Windows.Forms.Keys.Down) < 0;

            this.Update(left, right, up, down);
        }

        [DllImport("user32.dll")]
        public static extern int GetAsyncKeyState(int vkey);

        private void Update(bool left, bool right, bool up, bool down)
        {
            this.labelLeft.Enabled = left;
            this.labelRight.Enabled = right;
            this.labelUp.Enabled = up;
            this.labelDown.Enabled = down;
        }

        private void Form1_KeyUp(object sender, KeyEventArgs e)
        {
            this.Update(false, false, false, false);
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.Update(false, false, false, false);
        }
    }
}