How To Prevent Enter Key From Sending Chat Message

Yes, that could work.

I recently had used keyboard remapping via Power toy to get euro symbol on my Dell Multilingual qwerty keyboard so that AltGr+4 which what it is on British qwerty keyboard.

While doing that I thought about this problem, but you need to limit it to a site or application. I think you can, but I didn't dare to try, in case it become a new side project again.

Has anyone done it limiting the remap to a certain site or application?

I didn't want to play the lab mouse.

Thank you for the useful info ! very helpful !

You might try mapping enter to shift-enter, and mapping shift-enter to ctrl-enter.
If you hit ctrl-enter, it sends from either mode, and shift-enter enters a newline in either mode. There might be a combo that gets you the behavior you want.

Great idea, thank you.

I'm embarrassed I never dug deep enough to notice enter is the only related key stroke that changes with mode. But if this mapping works in all the other teams windows, it just might save my sanity!

You might try mapping enter to shift-enter, and mapping shift-enter to ctrl-enter.
If you hit ctrl-enter, it sends from either mode, and shift-enter enters a newline in either mode. There might be a combo that gets you the behavior you want.

This portion of my example script:

#HotIf WinActive("ahk_exe ms-teams.exe")

will limit this hotkey to ONLY swap the keymapping within teams.

I had independently tried an AutoHotKey fix to map shift+enter to enter and vice versa. I threw it away because I couldn't find a way to make the script understand the format vs normal mode. Swapping the keys just swaps the mode in which the accidental sends happen, and it turns out I use both.
If there is to be an keyboard shortcut for something that isn't related to entering text, it needs to be constant through editing modes. An exception for letters and caps lock, but if I miss that mode toggle then I'm only shouting and that I can edit before the message is sent out.

Funny thing, in this text entry box, enter does as enter should even before I click a format function.