When I make a game, I like to put msgbox_p("Foo bar") in my events.
However, I may be distracted and I'll be forgetting to remove them when unnecessary.
Acting as a debugging tool or a to-do list, msgbox_p displays a little window with information between the parenthesis.
The script executes when you launch your game. If no pop-up is displayed, it means there aren't any msgbox_p in your events.
The script is bilingual (default: English, secondary: French).