Uint32 SDL_RegisterEvents(int numevents)

Uint32 myEventType = SDL_RegisterEvents(1);
if (myEventType != ((Uint32)-1))
{
    SDL_Event event;
    SDL_memset(&event, 0, sizeof(event)); /* lub SDL_zero(event) */
    event.type = myEventType;
    event.user.code = my_event_code;
    event.user.data1 = significant_data;
    event.user.data2 = 0;
    SDL_PushEvent(&event);
}