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Programatically turn on/off Japanese IME Kana/Romaji input mode

CHAN Samuel 0 Reputation points
2024-10-03T02:46:06.51+00:00

I am trying to programmatically turn on/off Japanese Kana/Romaji input mode. This is equivalent to the "Kana input" option in the IME input menu

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I have tried to use InputMethod.SetPreferredImeConversionMode but it can only sets the TextBox into Hiragana/Alphanumeric/Katakana input.

Are there any Win32 APIs we can use to change this Kana/Romaji input mode?

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  1. Castorix31 84,956 Reputation points
    2024-10-03T07:21:16.48+00:00

    On my OS (Windows 10 22H2), I can change it in Registry, at the key :

    HKEY_CURRENT_USER\SOFTWARE\AppDataLow\Software\Microsoft\IME\15.0\IMEJP\MSIME

    kanaMd (0 or 1)

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  1. uncle_Kei 0 Reputation points
    2024-10-03T05:53:28.3166667+00:00

    I am a Japanese programmer.

    There is a function in 'Imm32.lib' called "ImmSetConversionStatus()".

    In general, it is reasonable to restrict input mode according to input items.

    However, we do not agree with the specification that the application changes the input mode of the IME.

    This is because some people prefer romaji input and some prefer hiragana input, and these people do not like to have their input mode changed without their permission. In other words, Japanese people do not like to have their IME controlled by others.

    *Translated with DeepL.com (free version)

  2. Tong Xu - MSFT 2,456 Reputation points Microsoft Vendor
    2024-10-03T06:31:20.32+00:00

    @CHAN Samuel As @uncle_Kei mentioned, You can use ImmSetConversionStatus by setting unnamedParam2 of Conversion mode values. IME_CMODE_KATAKANA, Set to 1 if KATAKANA mode; 0 if HIRAGANA mode.

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