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)
Programatically turn on/off Japanese IME Kana/Romaji input mode
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CHAN Samuel
20
Reputation points
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
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?
Windows development | Windows API - Win32
Developer technologies | Visual Studio | Other
Developer technologies | Visual Studio | Other
A family of Microsoft suites of integrated development tools for building applications for Windows, the web, mobile devices and many other platforms. Miscellaneous topics that do not fit into specific categories.
Developer technologies | C#
Developer technologies | C#
An object-oriented and type-safe programming language that has its roots in the C family of languages and includes support for component-oriented programming.
Answer accepted by question author
2 additional answers
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uncle_Kei 45 Reputation points2024-10-03T05:53:28.3166667+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)
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CHAN Samuel 20 Reputation points
2024-10-03T06:26:14.6466667+00:00 Thank you @uncle_Kei I totally agree with what you said. We have to add buttons in our application to allow users to toggle between Kana/Romaji input mode.
Do you mind sharing the flags you are using inside the “ImmSetConversionStatus()” function call to toggle between Kana/Romaji?
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Tong Xu - MSFT 2,546 Reputation points Microsoft External Staff2024-10-03T06:31:20.32+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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CHAN Samuel 20 Reputation points
2024-10-03T06:47:53.2766667+00:00 @Tong Xu - MSFT thanks. I have tried to use IME_CMODE_KATAKANA. It will switch text input to Katakana input which is not what we wanted.
We are trying to toggle in code between Hiragana in Kana mode and Hiragana in Romaji mode (typing Japanese in english alphabet and Windows will convert it into Japanese characters). This toggle is available on the Japanese IME option (screenshot in my original question) but we are unable to toggle this programmatically.
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