在 VSTO 插件中获取 Word 进程的键盘输入

Question

我正在尝试使用 MouseKeyboardActivityMonitor Nugget 在我的 Word 插件中收听键盘输入。当我注册 KeyboardHookListener 时，我能够接收除 Word 之外的每个程序上的每个键盘输入。

这可能是 Word 内部保护的原因还是我遗漏了什么？

我有 Windows 7 64 位和 Word 2016 32 位。

k_keyListener = new KeyboardHookListener(new GlobalHooker());
k_keyListener.Enabled = true;
k_keyListener.KeyDown += new System.Windows.Forms.KeyEventHandler(hook_OnKeyDown);

public void hook_OnKeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
{
    log.Info("Pressed key: " + e.KeyCode.ToString());
}

Answer 1

我不使用 Global Hooker，我的代码可以正常工作。我在 Word 中明确测试过它（并且知道它可以在 Excel、PowerPoint、Access 等中使用）。

不管怎样，Microsoft 一直担心 Office 应用程序被黑客入侵，而您的安全软件实际上可能就是原因。毕竟它是一个 KeyLogger，很容易被贴上病毒注入攻击的标签。

public partial class ThisAddIn
{
    private void ThisAddIn_Startup(object sender, System.EventArgs e)
    {
        //enable keyboard intercepts
        KeyboardHooking.SetHook();
    }

    private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
    {
        //disable keyboard intercepts
        KeyboardHooking.ReleaseHook();
    }
}

添加这个键盘类：

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

namespace WordAddInKeyHandler
{
    class KeyboardHooking
    {
        [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);

        public delegate int LowLevelKeyboardProc(int nCode, IntPtr wParam, IntPtr lParam);
        private static LowLevelKeyboardProc _proc = HookCallback;
        private static IntPtr _hookID = IntPtr.Zero;

        //declare the mouse hook constant.
        //For other hook types, you can obtain these values from Winuser.h in the Microsoft SDK.

        private const int WH_KEYBOARD = 2; // mouse
        private const int HC_ACTION = 0;

        private const int WH_KEYBOARD_LL = 13; // keyboard
        private const int WM_KEYDOWN = 0x0100;

        public static void SetHook()
        {
            // Ignore this compiler warning, as SetWindowsHookEx doesn't work with ManagedThreadId
#pragma warning disable 618
            _hookID = SetWindowsHookEx(WH_KEYBOARD, _proc, IntPtr.Zero, (uint)AppDomain.GetCurrentThreadId());
#pragma warning restore 618

        }

        public static void ReleaseHook()
        {
            UnhookWindowsHookEx(_hookID);
        }

        //Note that the custom code goes in this method the rest of the class stays the same.
        //It will trap if BOTH keys are pressed down.
        private static int HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
        {
            if (nCode < 0)
            {
                return (int)CallNextHookEx(_hookID, nCode, wParam, lParam);
            }
            else
            {
                if (nCode == HC_ACTION)
                {
                    Keys keyData = (Keys)wParam;

                    // CTRL + SHIFT + 7
                    if ((BindingFunctions.IsKeyDown(Keys.ControlKey) == true)
                        && (BindingFunctions.IsKeyDown(Keys.ShiftKey) == true)
                        && (BindingFunctions.IsKeyDown(keyData) == true) && (keyData == Keys.D7))
                    {
                        // DO SOMETHING HERE
                    }

                    // CTRL + 7
                    if ((BindingFunctions.IsKeyDown(Keys.ControlKey) == true)
                        && (BindingFunctions.IsKeyDown(keyData) == true) && (keyData == Keys.D7))
                    {
                        // DO SOMETHING HERE
                    }
                }
                return (int)CallNextHookEx(_hookID, nCode, wParam, lParam);
            }
        }
    }

    public class BindingFunctions
    {
        [DllImport("user32.dll")]
        static extern short GetKeyState(int nVirtKey);

        public static bool IsKeyDown(Keys keys)
        {
            return (GetKeyState((int)keys) & 0x8000) == 0x8000;
        }
    }
}

如果您有时间，您可以通过将 Global Hooker 源代码与我的源代码进行比较来检查 Global Hooker 无法正常工作的原因（特别是使用 Word）。

在此处参考我的答案：https://stackoverflow.com/a/10257266/495455 另请参阅 XNA 的作者 Govert 的答案。