SDL_QuitEvent is a member of the SDL_Event union and is used whan an event of type SDL_QUIT is reported.
As can be seen, the SDL_QuitEvent structure serves no useful purpose. The event itself, on the other
hand, is very important. If you filter out or ignore a quit event then it is impossible for the user to
close the window. On the other hand, if you do accept a quit event then the application window will be
closed, and screen updates will still report success event though the application will no longer be
visible.
Note:
The macro SDL_QuitRequested will return non-zero if a quit event is pending