WINCE6.0 键盘钩子 SetWindowsHookEx返回0，安装钩子失败，求解

[周美文]

背景是参照网上用 C#写了个键盘钩子类，然后到wince6.0系统下运行程序发现 键盘钩子安装失败，有哪位对这方面有所了解的啊，还请帮忙分析分析！代码如下，其中
hHookKey = SetWindowsHookEx(WH_KEYBOARD_LL, hookKeyDeleg, GetModuleHandle(null), 0);为0

 public class HookKeyClass
    {
        public delegate int HookKeyProc(int code, IntPtr wParam, IntPtr lParam);
        public delegate void KeyEventHandler(int KeyValue);
        public event KeyEventHandler KeyEvent;
        private HookKeyProc hookKeyDeleg;
        private int hHookKey = 0;
        public HookKeyClass()
        {
            Start();
        }

        ~HookKeyClass()
        {
            Stop();
        }


        #region public methods
        //安装钩子
        private void Start()
        {
            if (hHookKey != 0)
            {
                //Unhook the previouse one
                this.Stop();
            }

            hookKeyDeleg = new HookKeyProc(HookKeyProcedure);
            hHookKey = SetWindowsHookEx(WH_KEYBOARD_LL, hookKeyDeleg, GetModuleHandle(null), 0);
            if (hHookKey == 0)
            {
                throw new SystemException("Failed acquiring of the hook.");
            }
        }

        //拆除钩子
        private void Stop()
        {
            UnhookWindowsHookEx(hHookKey);
        }

        #endregion


        #region protected and private methods
        private int HookKeyProcedure(int code, IntPtr wParam, IntPtr lParam)
        {
            switch ((int)wParam)
            {
                case 257:         //按下响应
                    KBDLLHOOKSTRUCT hookStruct = (KBDLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(KBDLLHOOKSTRUCT));
                    if (code < 0)
                    { 
                        return CallNextHookEx(hookKeyDeleg, code, wParam, lParam); 
                    }
                    //if(hookStruct.vkCode==201 | 
                    KeyEvent(hookStruct.vkCode);
                    break;
                case 256:

                    break;

                default: break;
            }

            return CallNextHookEx(hookKeyDeleg, code, wParam, lParam);
        }
        #endregion


        #region P/Invoke declarations

        [DllImport("coredll.dll")]
        private static extern int SetWindowsHookEx(int type, HookKeyProc HookKeyProc, IntPtr hInstance, int m);
        //private static extern int SetWindowsHookEx(int type, HookMouseProc HookMouseProc, IntPtr hInstance, int m);

        [DllImport("coredll.dll")]
        private static extern IntPtr GetModuleHandle(string mod);


        [DllImport("coredll.dll")]
        private static extern int CallNextHookEx(HookKeyProc hhk, int nCode, IntPtr wParam, IntPtr lParam);


        [DllImport("coredll.dll")]
        private static extern int GetCurrentThreadId();

        [DllImport("coredll.dll", SetLastError = true)]
        private static extern int UnhookWindowsHookEx(int idHook);
        private struct KBDLLHOOKSTRUCT
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
            public IntPtr dwExtraInfo;
        }

        const int WH_KEYBOARD_LL = 20;
        public class KeyBoardInfo
        {
            public int vkCode;
            public int scanCode;
            public int flags;
            public int time;
        }
        #endregion
    }

[周美文]

以前也没接触过wince系统、钩子什么的，着实有些不知从哪下手

[cheery_an]

先网上查下吧，比如：http://www.csharpwin.com/csharpspace/3766r5747.shtml