最小化时的 C# 击键拦截器

Question

好的，所以我正在尝试编写一个程序来跟踪我在玩游戏时的击键，以便我以后可以分析数据以帮助我改进我的游戏。我一直在尝试做的是使用 user32.dll 的 RegisterHotKey 实现一个全局热键挂钩。但这会完全捕获击键，并且游戏不再接收击键。我不知道从这里去哪里，任何指针都将不胜感激。以下是一些附加信息：

• 我正在使用 C#
• .NET 4
• 使用 Visual Studio 2010
• 我并没有试图做任何违法的事情，或者违反游戏服务条款

Answer 1

这取自 Stephan Toubs 2006 年的博客：

http://blogs.msdn.com/b/toub/archive/2006/05/03/589423.aspx

using System.Diagnostics;
using System.Windows.Forms;
using System.Runtime.InteropServices;

class InterceptKeys
{
   private const int WH_KEYBOARD_LL = 13;
   private const int WM_KEYDOWN = 0x0100;
   private static LowLevelKeyboardProc _proc = HookCallback;
   private static IntPtr _hookID = IntPtr.Zero;

   public static void Main()
   {
       _hookID = SetHook(_proc);
       Application.Run();
       UnhookWindowsHookEx(_hookID);
   }

   private static IntPtr SetHook(LowLevelKeyboardProc proc)
   {
       using (Process curProcess = Process.GetCurrentProcess())
       using (ProcessModule curModule = curProcess.MainModule)
       {
        return SetWindowsHookEx(WH_KEYBOARD_LL, proc,
            GetModuleHandle(curModule.ModuleName), 0);
       }
    }

    private delegate IntPtr LowLevelKeyboardProc(
    int nCode, IntPtr wParam, IntPtr lParam);

    private static IntPtr HookCallback(
    int nCode, IntPtr wParam, IntPtr lParam)
   {
       if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
       {
           int vkCode = Marshal.ReadInt32(lParam);
           Console.WriteLine((Keys)vkCode);
       }

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

   [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
   private static extern IntPtr SetWindowsHookEx(int idHook,
   LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);

   [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
   [return: MarshalAs(UnmanagedType.Bool)]
   private static extern bool  UnhookWindowsHookEx(IntPtr hhk);

   [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
   private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
    IntPtr wParam, IntPtr lParam);

   [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
   private static extern IntPtr GetModuleHandle(string lpModuleName);
}