如何在Wndproc中专门在C＃Winform中获取IME布局？

Question

I have a winform application, I want to get the information of current typing language in C#. I have windows 10 machine, I have selected Korean language. There is one toggle button in taskbar to change input language as English or Korean once I select Korean language.

Following code always gives Korean language, but it should give English when I select input in English.

    [DllImport("user32.dll")]
    static extern IntPtr GetForegroundWindow();
    [DllImport("user32.dll")]
    static extern uint GetWindowThreadProcessId(IntPtr hwnd, IntPtr proccess);
    [DllImport("user32.dll")]
    static extern IntPtr GetKeyboardLayout(uint thread);
    public Form1()
    {
        InitializeComponent();
        IntPtr foregroundWindow = GetForegroundWindow();
        uint foregroundProcess = GetWindowThreadProcessId(foregroundWindow, IntPtr.Zero);
        int keyboardLayout = GetKeyboardLayout(foregroundProcess).ToInt32() & 0xFFFF;
        CultureInfo info = new CultureInfo(keyboardLayout);
        int keyboardLayoutId = info.KeyboardLayoutId;
        string name = info.Name;
    }

Is there any other way to get the input language information.

You can find the attached image for the same. I have highlighted A as english input.

I want this information in WndProc method.

Problem Summry: So I want to handle the case when User switched language to type by toggle button, I want any wndproc message or window side event to get the language information, when User switches language by toggle button.

Answer 1

Your question is a result of a confusion of IME mode and the input layout. Your input layout is Korean in both cases - what changes is your IME mode.

You can find the IME mode of an input control using Control.ImeMode (and check for a change using Control.ImeModeChanged ). This will tell you that you're either in Korean - Hangul, or Korean - Alpha. EDIT: Actually, this only allows you to force a given setting, not read the user-specified IME mode, and apparently shouldn't be used.

Further complication is if you have global input enabled (available since Windows 8), where the input configuration is no longer stored per-thread, but rather is global. In that case ImeMode doesn't work, and is completely ignored. I don't think there's anything you can do about it from the application side - the setting is no longer yours to see or change. According to MSDN, the proper replacement would be the ImmGetConversionStatus function, though only for desktop applications.