NecroButton – An alternative table for raising undead.

You were on the right track – in the profile folder, in the input_a2.cfg file, there are sections responsible for windows (WindowScreen); you need to specify the key and command designation in the appropriate section, and then specify the command in the button using GameMessageReactions
Attachment 68014
Attachment 68013

I made a button to exit onto InactiveBg.(BackgroundSimpleTexture).xdb and connected an event to it that triggers when ESC is pressed.
Attachment 68015
Here’s an example of an unfinished battle interface mod - Attachment 68016

The button stays in the “active” position after being deactivated by Esc. As a result, clicking on it does nothing, and only on the second click does it activate the window with the table.