Hello
Based on the information I found, it seems that there isn’t a straightforward way to remove or block the advanced input and settings buttons from the TabTip.exe interface. The TabTip.exe interface is part of the Windows operating system and is not designed to be customizable to this extent.
However, you might be able to achieve your goal by creating a custom keyboard layout that only includes the keys you want. This would involve creating a new keyboard layout using the Microsoft Keyboard Layout Creator. Once you’ve created your custom layout, you can set it as the default input method.
As for locking the input mode, it seems that this is also not directly supported by TabTip.exe. The input mode (handwriting or keyboard) is typically chosen by the user and is not meant to be locked.
Please note that these are advanced modifications and should be done with caution. Always make sure to back up your system before making any changes.