C# - Global Hook

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;
using Utilities;

namespace WindowsFormsApplication9
{
    public partial class Form1 : Form
    {
        globalKeyboardHook hook = new globalKeyboardHook();

        public Form1()
        {
            InitializeComponent();
            
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            hook.HookedKeys.Add(Keys.Alt);
        }

        private void timerhook_Tick(object sender, EventArgs e)
        {
            hook.KeyDown += new KeyEventHandler(hook_KeyDown); //Taste wird gedrückt
            hook.KeyUp += new KeyEventHandler(hook_KeyUp); //Taste wird losgelassen
        }

        void hook_KeyDown(object sender, KeyEventArgs e)
        {
            //Dein Code
            e.Handled = true;
        }

        void hook_KeyUp(object sender, KeyEventArgs e)
        {
            //Dein Code
            e.Handled = true;
        }

    }
}