using System;
　　using System.IO;
　　using System.Reflection;
　　using System.Runtime.InteropServices;
　　using System.Windows.Forms;
　　namespace WAT.PMS
　　{
　　/**//// <summary>
　　/// Description: Hook Helper类，可以屏蔽一些热键并屏蔽任务管理器
　　/// Author: ZhangRongHua
　　/// Create DateTime: 2009-6-19 20:21
　　/// UpdateHistory:
　　/// </summary>
　　public class HookHelper
　　{
　　Delegates#region Delegates
　　public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam);
　　#endregion
　　变量声明#region 变量声明
　　private HookProc KeyboardHookProcedure;
　　private FileStream MyFs; // 用流来屏蔽ctrl alt delete
　　private const byte LLKHF_ALTDOWN = 0x20;
　　private const byte VK_CAPITAL = 0x14;
　　private const byte VK_ESCAPE = 0x1B;
　　private const byte VK_F4 = 0x73;
　　private const byte VK_LCONTROL = 0xA2;
　　private const byte VK_NUMLOCK = 0x90;
　　private const byte VK_RCONTROL = 0xA3;
　　private const byte VK_SHIFT = 0x10;
　　private const byte VK_TAB = 0x09;
　　public const int WH_KEYBOARD = 13;
　　private const int WH_KEYBOARD_LL = 13;
　　private const int WH_MOUSE = 7;
　　private const int WH_MOUSE_LL = 14;
　　private const int WM_KEYDOWN = 0x100;
　　private const int WM_KEYUP = 0x101;
　　private const int WM_LBUTTONDBLCLK = 0x203;
　　private const int WM_LBUTTONDOWN = 0x201;
　　private const int WM_LBUTTONUP = 0x202;
　　private const int WM_MBUTTONDBLCLK = 0x209;
　　private const int WM_MBUTTONDOWN = 0x207;
　　private const int WM_MBUTTONUP = 0x208;
　　private const int WM_MOUSEMOVE = 0x200;
　　private const int WM_MOUSEWHEEL = 0x020A;
　　private const int WM_RBUTTONDBLCLK = 0x206;
　　private const int WM_RBUTTONDOWN = 0x204;
　　private const int WM_RBUTTONUP = 0x205;
　　private const int WM_SYSKEYDOWN = 0x104;
　　private const int WM_SYSKEYUP = 0x105;
　　private static int hKeyboardHook = 0;
　　#endregion
　　函数转换#region 函数转换
　　[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
　　public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);
　　
　　　//   卸载钩子
　　[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
　　public static extern bool UnhookWindowsHookEx(int idHook);
　　//   继续下一个钩子
　　[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
　　public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam);
　　//   取得当前线程编号
　　[DllImport("kernel32.dll")]
　　private static extern int GetCurrentThreadId();
　　[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]