为什么全局键盘钩子在龙之谷里截获不到？

[linchenrr]

RT，在记事本等程序中能正常使用，切到龙之谷(3D网游)里面就截获不到了，想做个热键功能，比如龙本的秒退，麻烦路过的各位指教一下 多谢~

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Reflection;
using System.Windows.Forms;


namespace test
{
    /// <summary>
    /// 捕捉 键盘 按键
    /// </summary>
    public class HookHotKeys
    {
        public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);
        static int hHook = 0;
        public const int WH_KEYBOARD_LL = 13;
        private const int WM_KEYUP = 0x101;              //按键抬起
        private const int WM_KEYDOWN = 0x100;        //按键按下
        //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;
        //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;
        }
        #region DllImport
        //设置钩子
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        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", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        //调用下一个钩子
        public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, IntPtr lParam);
        #endregion


        public void Hook_Start()
        {
            // 安装键盘钩子
            if (hHook == 0)
            {
                KeyBoardHookProcedure = new HookProc(KeyBoardHookProc);
                hHook = SetWindowsHookEx(WH_KEYBOARD_LL,
                            KeyBoardHookProcedure,
                            Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 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 int KeyBoardHookProc(int nCode, IntPtr wParam, IntPtr lParam)
        {
            if (nCode >= 0)
            {
                //如果按键按下
                if (wParam == (IntPtr)WM_KEYDOWN)
                {
                    KeyBoardHookStruct kbh = (KeyBoardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyBoardHookStruct));

                    if (kbh.vkCode == (int)Keys.Escape)
                    {
                        MessageBox.Show("截获按键!");
                        
                        return 1;
                    }

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

[linchenrr]

是不是这个钩子还不够底层？ 我看到网上有些程序时可以做到的