Source/Hook.cs

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#define NO_UNSAFE
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace DevComponents.DotNetBar
{
	/// <summary>
	/// Summary description for Hook.
	/// </summary>
	internal class Hook : IDisposable
	{
		private const int WH_MOUSE = 7;
		private const int HC_ACTION = 0;
		private const int WM_MOUSEMOVE = 0x0200;
		private const int WH_KEYBOARD = 2;

		private const int KF_EXTENDED=0x0100;
		private const int KF_DLGMODE=0x0800;
		private const int KF_MENUMODE=0x1000;
		private const int KF_ALTDOWN=0x2000;
		private const int KF_REPEAT=0x4000;
		private const int KF_UP=0x8000;

		private IntPtr m_hMouseHook=IntPtr.Zero;
		private IntPtr m_hKeyboardHook=IntPtr.Zero;
		private MouseProc m_mouseHook;
		private KeyboardProc m_keyboardHook;
		private IMessageHandlerClient m_Client=null;

		public Hook(IMessageHandlerClient client)
		{
			m_Client=client;
			m_mouseHook = new MouseProc(OnMouseHook);
			m_keyboardHook=new KeyboardProc(OnKeyboardHook);
			m_hMouseHook = SetWindowsHookEx(WH_MOUSE, m_mouseHook, IntPtr.Zero, GetCurrentThreadId());
			m_hKeyboardHook=SetWindowsHookExKeyboard(WH_KEYBOARD,m_keyboardHook,IntPtr.Zero,GetCurrentThreadId());
			if (m_hMouseHook == IntPtr.Zero || m_hKeyboardHook==IntPtr.Zero)
			{
				throw new Win32Exception();
			}
		}

		public void Dispose() 
		{
			if (m_hMouseHook != IntPtr.Zero)
			{
				IntPtr h = m_hMouseHook;
				m_hMouseHook = IntPtr.Zero;
				UnhookWindowsHookEx(h);
			}
			if (m_hKeyboardHook != IntPtr.Zero)
			{
				IntPtr h = m_hKeyboardHook;
				m_hKeyboardHook = IntPtr.Zero;
				UnhookWindowsHookEx(h);
			}
		}