键盘挂钩在C＃中全局禁用它

Question

有人知道如何在C＃中禁用键盘全局开发钩子？

我有一个源代码，它实现了一个钩子，可以在同一个应用程序中禁用键盘，但是如果我执行它并且键盘在文本编辑器中工作，那么在Windows 7中不能工作（我可以继续写）我希望全局捕获/禁用键盘（对于所有正在运行的应用程序）。我的目的是完全锁定Windows 7。

这是我的钩码：

globalKeyboardHook gkh = new globalKeyboardHook();

/// <summary>
/// Installs the global hook
/// </summary>
public void hook() {
    IntPtr hInstance = LoadLibrary("User32");
    hhook = SetWindowsHookEx(WH_KEYBOARD_LL, hookProc, hInstance, 0);
}


public int hookProc(int code, int wParam, ref keyboardHookStruct lParam) {
    //indicates if any of underlaing events set e.Handled flag
    bool handled = false;
    IntPtr lFakeParam = new IntPtr(lParam.vkCode);

    if ((code >= 0) && (KeyDown != null || KeyUp != null || wParam == WM_SYSKEYDOWN || wParam == WM_SYSKEYUP))
    {
        //read structure KeyboardHookStruct at lParam
        keyboardHookStruct MyKeyboardHookStruct = (keyboardHookStruct)Marshal.PtrToStructure(lFakeParam, typeof(keyboardHookStruct));
        Keys keyData = (Keys)MyKeyboardHookStruct.vkCode;

        KeyEventArgs e = new KeyEventArgs(keyData);

        log.Debug("cached wParam = [" + wParam + "] vkCode = [" + MyKeyboardHookStruct.vkCode + "] flags = [" + MyKeyboardHookStruct.flags + "]");

        if (MyKeyboardHookStruct.vkCode == 144)
        {
            // NUMLOCK
            handled = false;
        }

        KeyDown(this, e);
    }
    //if event handled in application do not handoff to other listeners
    if (handled)
    {
        SendKeys.Send("{NUMLOCK}");
        SendKeys.Send("{NUMLOCK}");
        return 1;
        //return CallNextHookEx(hKeyboardHook, nCode, wParam, lFakeParam);
    }
    else
    {
        return CallNextHookEx(hhook, code, wParam, ref lParam);
    }
}

提前致谢！