Possible to change keyboard input language programmatically ?

[blackfinger]

Hi to all! So as the title says, if somebody has 2 or more input languages installed in Windows is there any way in LabVIEW to get the current language and change that to the preferred one? I have a string control which needs to accept only english characters to avoid problems

[zou]

Language bar => settings => Advanced Key Settings, create a shortcut for English.  For example Ctrl+Shift+0.

Simulate a keyboard press, and send it your window.

[jra_eltwin]

Another option could be to filter your input to the control by using the "key down?" event.

[blackfinger]

Thanks, zoo.I agree that this would be an easy solution but it's kind of personal one. I don't think it would be convenient for deployment of an application

[zou]

Can we assume English (US) is installed?

[zou]

Use Windows API post a message (WM_INPUTLANGUAGECHNAGEREQUEST = 0x50) to the window:

PostMessage(hWnd, 0x50, 0, 0x0409);

0x0409 is US English.

[zou · Accepted solution]

For those who are not familiar Windows API, try this llb.

[AlexanderU]

Hello Zou,

thank you for posting Inpullanguage.llb.

Although in my case Set InputLanguage.vi doesn't seem to work. Keyboard layout wouldn't switch when I execute it.

Enumerate InputLanguages.vi and Get Default InputLanguage.vi work just fine.

I wonder if it could be caused by some Windows background service not running?

In VI i'm working on I need to set ENG-US keyboard layout to avoid mistakes as user inputs data.

My set is as follows:

LabView 2020 full 32-bit

Windows 10 Pro x64

[zou]

The demo vi works fine on my Windows 11 with LabVIEW 2021.