挂钩键盘：如何获取按下该键的程序的名称？

Question

我用 C# 做了一个简单的钩子键盘，所以我有以下代码：

        private static IntPtr hKeyboardHook = IntPtr.Zero;
        private const int WH_KEYBOARD_LL = 13;
        private const int WM_KEYDOWN = 0x100;

        private delegate IntPtr LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr 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, CallingConvention = CallingConvention.StdCall, SetLastError = true)]
        private static extern int UnhookWindowsHookEx(IntPtr idHook);
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
        [DllImport("user32")]
        private static extern int ToAscii(int uVirtKey, int uScanCode, byte[] lpbKeyState, byte[] lpwTransKey, int fuState);
        [DllImport("user32")]
        private static extern int GetKeyboardState(byte[] pbKeyState);
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
        private static extern short GetKeyState(int vKey);
        private delegate int HookProc(int nCode, int wParam, IntPtr lParam);
        [DllImport("kernel32.dll")]
        public static extern IntPtr GetModuleHandle(string lpModuleName);
        private static LowLevelKeyboardProc _proc = HookCallback;

 public void initialization()
        {
            using (Process curProcess = Process.GetCurrentProcess())
                using (ProcessModule curModule = curProcess.MainModule)
                {
                    hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, _proc, GetModuleHandle(curModule.ModuleName), 0);
                }  
        }

    private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
    {
        if (nCode >= 0 && wParam == (IntPtr)WM_KEYDOWN)
        {
            int vkCode = Marshal.ReadInt32(lParam);
            if (vkCode >= 32 && vkCode < 160)
                Console.Write((Keys)vkCode);
            if (vkCode == 13)
                Console.WriteLine("\n");
        }
        return CallNextHookEx(hKeyboardHook, nCode, wParam, lParam);
    }

它工作正常，没有问题！我的程序抓住其他程序中按下的所有键并将其写在控制台上。 但我想知道按下按键的程序的名称，但我不知道该怎么做。

任何人都可以帮助我吗？

Answer 1

您正在使用低级挂钩 (WH_KEYBOARD_LL)。在窗口管理器决定哪个程序将接收消息之前调度低级挂钩。因此，不存在“按下按键的程序的名称”，因为窗口管理器尚未决定按键将被传递到哪个程序。 （你可以通过调用GetForegroundWindow来尝试猜测。）

（只是好奇：你试图使用键盘钩子解决的最终问题是什么？也许有更好的方法。我希望你是不写键盘记录器。）