SDL_HINT_QUIT_ON_LAST_WINDOW_CLOSE - Man Page

#include <SDL3/SDL_hints.h>

#define SDL_HINT_QUIT_ON_LAST_WINDOW_CLOSE "SDL_QUIT_ON_LAST_WINDOW_CLOSE"

The variable can be set to the following values:

· "0": SDL will not send an SDL_EVENT_QUIT event when the last window is requesting to close. Note that in this case, there are still other legitimate reasons one might get an SDL_EVENT_QUIT event: choosing "Quit" from the macOS menu bar, sending a SIGINT (ctrl-c) on Unix, etc.

· "1": SDL will send a quit event when the last window is requesting to close. (default)

If there is at least one active system tray icon, SDL_EVENT_QUIT will instead be sent when both the last window will be closed and the last tray icon will be destroyed.

This hint can be set anytime.

This hint is available since SDL 3.2.0.