Minimal Key Logger Using RAWINPUT

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private RawInputHook InputHook;

        public void InputFromKeyboard(RAWINPUTHEADER riHeader, RAWKEYBOARD riKeyboard)
        {
            string s = "";
            s = s + "MCode: 0x" + riKeyboard.MakeCode.ToString("X4");
            s = s + "  VKey: 0x" + riKeyboard.VKey.ToString("X4");
            s = s + "  Mssg: 0x" + riKeyboard.Message.ToString("X4");
            s = s + "  Flag: 0x" + riKeyboard.Flags.ToString("X4");
            s = s + "   Rsrvd: 0x" + riKeyboard.Reserved.ToString("X4");
            s = s + "   ExInf: 0x" + riKeyboard.ExtraInformation.ToString("X4");
            s = s + "  Devc: 0x" + riHeader.hDevice.ToString("X4");
            s = s + "   .Size: 0x" + riHeader.dwSize.ToString("X4");
            s = s + "   .Type: 0x" + riHeader.dwType.ToString("X4");
            s = s + "   wPara: 0x" + riHeader.wParam.ToString("X4");
            s = s + "\r\n";
            System.Diagnostics.Debug.Write(s);
            this.textBox1.Text += s;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            InputHook = new RawInputHook();
            InputHook.OnRawInputFromKeyboard += InputFromKeyboard;
        }
    }
}