Puzzle: Access Message Boxes with no code

This short video shows an example app with 3 types of message box, all created with no VBA code. The puzzle is to work out how this is done! Just for clarification, when I said this is done without any code, I didn't mean that AI had written the code for me. There is no VBA code anywhere in the database. The example app is available at https://isladogs.co.uk/access-msgbox-no-code and you can find more puzzles (some easier than others) at https://isladogs.co.uk/security-challenges