How to get current IME input mode

Question

The korean layout has alphabet mode and hangul mode.

I only need hangul mode in the korean layout. To suppress alphabet mode I wrote this code but I could not find the way to get current IME mode. Which Windows API can I use to implement checkKoreanInputMode() function?

#include <Windows.h>
#include <iostream>
#include <thread>

bool checkKoreanInputMode() {
    // check current IME layout and mode
}

void setKoreanInputMode() {
    keybd_event(VK_HANGUL, 0, 0, 0);
    keybd_event(VK_HANGUL, 0, KEYEVENTF_KEYUP, 0);
}

int main() {
    while (true) {
        if (!checkKoreanInputMode()) {
            std::cout << "Switching to Korean input mode." << std::endl;
            setKoreanInputMode();
        }
        std::this_thread::sleep_for(std::chrono::seconds(1));
    }
    return 0;
}

I tried to use ImmGetConversionStatus(), but ImmGetContext() returns always NULL even if I changed IME.

bool checkKoreanInputMode() {
    // Get the current IME context
    HIMC hIMC = ImmGetContext(GetForegroundWindow());
    if (hIMC == NULL){
        return false;
    }

    // Get the current IME mode
    DWORD dwConversion = 0, dwSentence = 0;
    bool isKoreanInputMode = false;

    if (ImmGetConversionStatus(hIMC, &dwConversion, &dwSentence)) {
        // Check if the current mode is Korean IME with English input mode
        isKoreanInputMode = (dwConversion & IME_CMODE_NATIVE) && !(dwConversion & IME_CMODE_ALPHANUMERIC);
    }

    // Release the IME context
    ImmReleaseContext(GetForegroundWindow(), hIMC);

    return isKoreanInputMode;
}

What am I doing wrong?

As @AndrásVarró indicated, I remember the imeapps sample which can get notified with WM_IME_NOTIFY and ImmGetConversionStatus. — YangXiaoPo-MSFT
– YangXiaoPo-MSFT, Commented May 9, 2024 at 3:20
Thanks for your comment and answer. But I could not use ImmGetConversionStatus() function and WM_IME_NOTIFY. Can you show me how to use it? — ironsand
– ironsand, Commented May 10, 2024 at 18:41
Try this answer stackoverflow.com/a/64285429/15511041, ImmGetDefaultIMEWnd and WM_IME_CONTROL. — YangXiaoPo-MSFT
– YangXiaoPo-MSFT, Commented May 11, 2024 at 0:29
It returns keyboard layout that is korean or english. I need to know mode of korean keyboard layout. The mode can be latin or hangul. — ironsand
– ironsand, Commented May 11, 2024 at 6:23
Although these values are not explained, you can test and utilize these values for your requirement. — YangXiaoPo-MSFT
– YangXiaoPo-MSFT, Commented May 13, 2024 at 2:16

score 1 · Accepted Answer · 2024-05-15 13:02:34Z

1

I found a function called ImmGetConversionStatus(), which

Retrieves the current conversion status.

Unfortunately, I could not find any parameter named hangul, but there is one called hanja. I do not speak korean thus I do not know if it is the same or not. Here are the sources:

Link to ImmGetContext()

Link to ImmGetConversionStatus()

Update:

I think the problem is with GetForeGroundWindow() function.

HIMC hIMC = ImmGetContext(GetForegroundWindow());

I suppose that you should use the ImmGetDefaultIMEWnd instead:

HIMC hIMC = ImmGetContext(ImmGetDefaultIMEWnd(GetForegroundWindow()));

According to this question - where ImmGetDefaultIMEWnd was used - it could work.

edited May 15, 2024 at 13:02

answered May 8, 2024 at 17:51

user24939354

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Comments

YangXiaoPo-MSFT · Accepted Answer · 2024-05-13 02:12:36Z

As @AndrásVarró indicated, I found the imeapps sample which can get notified with WM_IME_NOTIFY and ImmGetConversionStatus.

The following code is adapted from the imeapps sample.

   case WM_IME_NOTIFY:
    {
        switch (wParam)
        {
        case IMN_SETCONVERSIONMODE:
        {
            HIMC hIMC = ImmGetContext(hwnd);
            BOOL fOpen = ImmGetOpenStatus(hIMC);
            DWORD dwConvMode = 0, dwSentMode = 0;
            ImmGetConversionStatus(hIMC, &dwConvMode, &dwSentMode);
            if (fOpen)
            {
                switch (dwConvMode & IME_CMODE_LANGUAGE)
                {
                case IME_CMODE_ALPHANUMERIC:
                    //IME_CMODE_ALPHANUMERIC
                    break;   
                case IME_CMODE_NATIVE:
                    //IME_CMODE_NATIVE
                    break;  
                case (IME_CMODE_NATIVE | IME_CMODE_KATAKANA):
                    //IME_CMODE_KATAKANA
                    break;    
                default:
                    //NULL
                    break;
                }
            }
            break;
        }
        }
        break;
    }

Update @ironsand :

I tested these undocumented values with WM_IME_CONTROL. Maybe you can use 0x01.

#include <iostream>
#include <Windows.h>
#pragma comment (lib, "imm32.lib")
#define IMC_GETOPENSTATUS 0x0005
using namespace std;

int main() {
    while (true) {
        HWND hIME = ImmGetDefaultIMEWnd(GetForegroundWindow());
        LRESULT status = SendMessage(hIME, WM_IME_CONTROL, IMC_GETOPENSTATUS, 0);
        cout << (status ? "Korean" : "English") << endl;

        status = SendMessage(hIME, WM_IME_CONTROL, 0x01, 0);
        cout << status << "-0x01" << endl;
        /*status = SendMessage(hIME, WM_IME_CONTROL, 0x02, 0);
        cout << status << "-0x02" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x03, 0);
        cout << status << "-0x03" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x04, 0);
        cout << status << "-0x04" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x06, 0);
        cout << status << "-0x06" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x0D, 0);
        cout << status << "-0x0D" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x0E, 0);
        cout << status << "-0x0E" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x11, 0);
        cout << status << "-0x11" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x12, 0);
        cout << status << "-0x12" << endl;
        status = SendMessage(hIME, WM_IME_CONTROL, 0x13, 0);
        cout << status << "-0x13" << endl;*/

        Sleep(10000);
    }
    return 0;
}

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