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It receives a custom message (WM_USER + 101) where it checks the language with GetKeyboardLayout
How does the on screen keyboard detect user switch input method
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Mj Chen
1
Reputation point
When using English input method, the OSK interface is as follows
When using Japanese input method, the interface of OSK is as follows
How does OSK know that the user has switched and then changed the UI interface?
Windows for business | Windows Client for IT Pros | User experience | Other
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Percival Yang 731 Reputation points2021-07-14T01:11:54.483+00:00 Hi,
Just checking in to see if there is any progress on your issue
If further assistance were needed you could open a request ticket with Microsoft support for advisory
https://support.serviceshub.microsoft.com/supportforbusinessBest Regards
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4 answers
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Mj Chen 1 Reputation point
2021-07-02T09:37:34.45+00:00 Therefore, OSK can correctly switch the UI layout Because of receiving windows messgae and using GetKeyboardLayout to check right?Is it possible to identify by querying the registry edit?
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Percival Yang 731 Reputation points
2021-07-05T07:21:51.4+00:00 Hi，
Glad to help you, you might notice that the mechanism of OSK switch input language synchronize with hardware keyboard settings. There have simple options to change hotkeys about switching input languages.
Search→Typing→More Keyboard settings→advanced keyboards settings→input language hotkeys→change key sequence.
If you change the setting, it will also affect the OSK which means the registry editor also works. But before, you have to know it is not easy for you edit to the registry.
https://www.experts-exchange.com/articles/2155/Keyboard-Remapping-CAPSLOCK-to-Ctrl-and-Beyond.html
Note: Since the websites are not hosted by Microsoft, the links may change without notice. Microsoft does not guarantee the accuracy of this information.
Once, you create the scancode key, you can just delete the Scancode map in the following link to restore the changes.
Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard LayoutHope this can help you
If your need further help, be free reply to me at your convenience.
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Mj Chen 1 Reputation point
2021-07-05T08:41:19.067+00:00 hi,
Thanks for your answer.I don’t want to know how to change key sequence.I want to use windows service application to detect input method change by notify registry Or using windows application which without UI when user switch between Japanese and US. -
Percival Yang 731 Reputation points
2021-07-05T09:12:20.987+00:00 hi,
@Mj Chen
May I please just to confirm your utimate requirement that the system needs to get informed when input language is changed and make some chain reactions? If so what I can help so far is that, click search→open narrator→minimize.The effect will be that once you try to switch the input language by holding on pressing [win] and press [space] each time, the narrator will utter the current language.
Hope this can help you
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Mj Chen 1 Reputation point
2021-07-07T08:16:22.537+00:00 hi,
I want to use an application to get notifications from the system when the user switches input methods.Like OSK, The difference is that OSK has a window but my application doesn't display Windows interface. I don't know how to achieve this function. -
Castorix31 90,686 Reputation points2021-07-07T08:19:15.41+00:00 Without GUI, ITfLanguageProfileNotifySink
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Mj Chen 1 Reputation point
2021-07-09T09:49:16.703+00:00 hi Castorix31
Can you help me to solve the problem .When i used ITfInputProcessorProfileActivationSink ,i can detect input method change.But when i set GUI attributes to hide.it doesn't work.
thanks
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Mj Chen 1 Reputation point
2021-07-08T03:43:02.257+00:00 Hi Castorix31,
I want to detect the input method switch when I switch the input method (as shown in the picture below), my program must be able to detect the input method change.Even between English US keyboard and English Czech keyboard.
I create a windows desktop application like this
and use ITfInputProcessorProfileActivationSink to achieve the function I want.
Now i have a problem. When i set this GUI attributes to hide and change input method, i can't detect any input method change.
Are there any parameters I ignore.
thanks-
Percival Yang 731 Reputation points
2021-07-09T07:39:05.077+00:00 Hi
Deep research on OSK mechanism is beyond scope of forums support.
because you have to post your program on the community for us to check the details however it's may violate your piracy and security.
So if further assistance were needed you could open a request ticket with Microsoft support.
https://support.serviceshub.microsoft.com/supportforbusinessBest regards
Percival Yang
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