SDL_UnregisterApp - Man Page

#include <SDL3/SDL_main.h>

void SDL_UnregisterApp(void);

This can be called to undo the effects of SDL_RegisterApp.

Most applications do not need to, and should not, call this directly; SDL will call it when deinitializing the video subsystem.

It is safe to call this multiple times, as long as every call is eventually paired with a prior call to SDL_RegisterApp. The window class will only be deregistered when the registration counter in SDL_RegisterApp decrements to zero through calls to this function.

This function is available since SDL 3.2.0.