发送键命令 C#

Question

我会感谢任何可以提供帮助的人！

我正在使用下面的 InterceptKeys 类来更改一些键。例如，当我键入左括号键“[”时，我想将其更改为“ë”（无论何时我键入我的计算机，而不是特定程序）。 我使用 SendKey.Send("ë");每当键入“[”时，但问题是在“ë”之后也键入了“[”。 是否可以用“ë”或任何键替换“[”，或者取消“[”而只发送“ë”？

---

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);
            if (vkCode == (int)Keys.OemOpenBrackets))
            {

                SendKeys.Send("ë");                   

            }
        }

        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);
}

---

Answer 1

如果您处理了密钥而不是调用 CallNextHookEx，则返回 1。

IE，HookCallback() 应该是这样的

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);
        if (vkCode == (int)Keys.OemOpenBrackets))
        {

            SendKeys.Send("ë");                   
            return 1;
        }
    }

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