On Screen Keyboard in Kiosk mode (UWP)

Question

We have an UWP application running in fullscreen mode on Windows 10 in kiosk mode. It is installed using side loading.

The hardware is a panel computer with a touch screen and no physical keyboard.

1) When running the application on the desktop using the admin account, the on screen keyboard appear when an numerical input control is focused. (Not in kiosk mode)
2) The on screen keyboard is available to log in Windows!
3) The on screen keyboard doesn't appear when we are in Kiosk mode and focus the same control as above. (When running in the assigned account. The apps runs fine otherwise, just no OSK)

I have seen people telling in web answers that adding random registry keys solves their problem with similar issues.

What is a clean solution to this problem and where is the Microsoft documentation for this located?

Answer 1

Adding the following two reg entries and restart computer.
HKCU\Software\Microsoft\TabletTip\1.7\EnableDesktopModeAutoInvoke = 1
HKCU\Software\Microsoft\windows\CurrentVersion\ImmersiveShell\TabletMode = 1

My previous case.
https://learn.microsoft.com/en-us/answers/questions/119887/on-screen-keyboard-not-working-on-windows-10-kiosk.html

I don't find a specific Microsoft document explain this situation.

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Answer 2

Just a heads up. It is much easier and better to apply these to the LOCAL MACHINE registry hive NOT the CURRENT USER hive. Else you have to apply this and then switch to kiosk and then to kiosk app like edge. Wasted so much time applying to current user hive.