static int hHook = 0;

        public delegate int HookProc(int nCode, int wParam, IntPtr lParam);

        //LowLevel键盘截获，如果是WH_KEYBOARD＝2，并不能对系统键盘截取，Acrobat Reader会在你截取之前获得键盘。

        HookProc KeyBoardHookProcedure;

        public const int WH_KEYBOARD_LL = 13;

        //键盘Hook结构函数

        [StructLayout(LayoutKind.Sequential)]

        public class KeyBoardHookStruct

        {

            public int vkCode;

            public int scanCode;

            public int flags;

            public int time;

            public int dwExtraInfo;

        }

        //设置钩子

        [DllImport("user32.dll")]

        public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]

        //抽掉钩子

        public static extern bool UnhookWindowsHookEx(int idHook);

        [DllImport("user32.dll")]

        //调用下一个钩子

        public static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);

        [DllImport("kernel32.dll")]

        public static extern int GetCurrentThreadId();

        [DllImport("kernel32.dll")]

        public static extern IntPtr GetModuleHandle(string name);

        public void Hook_Start()

        {

            // 安装键盘钩子

            if (hHook == 0)

            {

                KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);

                hHook = SetWindowsHookEx(WH_KEYBOARD_LL,

                          KeyBoardHookProcedure,

                        GetModuleHandle(System.Diagnostics.Process.GetCurrentProcess().MainModule.ModuleName), 0);

                //如果设置钩子失败.

                if (hHook == 0)

                {

                    Hook_Clear();

                    //throw new Exception("设置Hook失败!");

                }

            }

        }

        //取消钩子事件

        public void Hook_Clear()

        {

            bool retKeyboard = true;

            if (hHook != 0)

            {

                retKeyboard = UnhookWindowsHookEx(hHook);

                hHook = 0;

            }

            //如果去掉钩子失败.

            if (!retKeyboard) throw new Exception("UnhookWindowsHookEx failed.");

        }

        //这里可以添加自己想要的信息处理

        public static int KeyBoardHookProc(int nCode, int wParam, IntPtr lParam)

        {

            if (nCode >= 0)

            {

                KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));

                if (kbh.vkCode == 91)  // 截获左win(开始菜单键)

                {

                    return 1;

                }

                if (kbh.vkCode == 92)// 截获右win

                {

                    return 1;

                }

                if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control) //截获Ctrl+Esc

                {

                    return 1;

                }

                if (kbh.vkCode == (int)Keys.F4 && (int)Control.ModifierKeys == (int)Keys.Alt)  //截获alt+f4

                {

                    return 1;

                }

                if (kbh.vkCode == (int)Keys.Tab && (int)Control.ModifierKeys == (int)Keys.Alt) //截获alt+tab

                {

                    return 1;

                }

                if (kbh.vkCode == (int)Keys.Escape && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Shift) //截获Ctrl+Shift+Esc

                {

                    return 1;

                }

                if (kbh.vkCode == (int)Keys.Space && (int)Control.ModifierKeys == (int)Keys.Alt)  //截获alt+空格

                {

                    return 1;

                }

                if (kbh.vkCode == 241)                  //截获F1

                {

                    return 1;

                }

                //if (kbh.vkCode == (int)Keys.Delete && (int)Control.ModifierKeys == (int)Keys.Control + (int)Keys.Alt)      //截获Ctrl+Alt+Delete

                //{

                //    return 1;

                //}

                if (kbh.vkCode == 122)  //截取F11

                {

                    return 1;

                }

            }

            return CallNextHookEx(hHook, nCode, wParam, lParam);

        }