MouseKeyboardActivityMonitor/KeyboardHookListener.cs

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using System;
using System.Windows.Forms;
using MouseKeyboardActivityMonitor.WinApi;

namespace MouseKeyboardActivityMonitor
{
    /// <summary>
    /// This class monitors all keyboard activities and provides appropriate events.
    /// </summary>
    public class KeyboardHookListener : BaseHookListener
    {
        /// <summary>
        /// Initializes a new instance of <see cref="KeyboardHookListener"/>.
        /// </summary>
        /// <param name="hooker">Depending on this parameter the listener hooks either application or global keyboard events.</param>
        /// <remarks>Hooks are not active after instantiation. You need to use either <see cref="BaseHookListener.Enabled"/> property or call <see cref="BaseHookListener.Start"/> method.</remarks>
        public KeyboardHookListener(Hooker hooker)
            : base(hooker)
        {
        }

        /// <summary>
        /// This method processes the data from the hook and initiates event firing.
        /// </summary>
        /// <param name="wParam">The first Windows Messages parameter.</param>
        /// <param name="lParam">The second Windows Messages parameter.</param>
        /// <returns>
        /// True - The hook will be passed along to other applications.
        /// <para>
        /// False - The hook will not be given to other applications, effectively blocking input.
        /// </para>
        /// </returns>
        protected override bool ProcessCallback(int wParam, IntPtr lParam)
        {
            KeyEventArgsExt e = KeyEventArgsExt.FromRawData(wParam, lParam, IsGlobal);

            InvokeKeyDown(e);
            InvokeKeyPress(wParam, lParam);
            InvokeKeyUp(e);

            return !e.Handled;
        }

        /// <summary>
        /// Returns the correct hook id to be used for <see cref="HookNativeMethods.SetWindowsHookEx"/> call.
        /// </summary>
        /// <returns>WH_KEYBOARD (0x02) or WH_KEYBOARD_LL (0x13) constant.</returns>
        protected override int GetHookId()
        {
            return IsGlobal ? 
                GlobalHooker.WH_KEYBOARD_LL : 
                AppHooker.WH_KEYBOARD;
        }

        /// <summary>
        /// Occurs when a key is pressed. 
        /// </summary>
        public event KeyEventHandler KeyDown;

        private void InvokeKeyDown(KeyEventArgsExt e)