Fields shared by every event (event.common.*)
Defined in <SDL3/SDL_events.h>
typedef struct SDL_CommonEvent
{
Uint32 type; /**< Event type, shared with all events, Uint32 to cover user events which are not in the SDL_EventType enumeration */
Uint32 reserved;
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
} SDL_CommonEvent;All the individual structs that comprise the SDL_Event union start with these same fields, so you can access them from any struct directly.
Event types that don't have further data in a specific struct will still have valid CommonEvent data, accessible via the event.common field.
This struct is available since SDL 3.2.0.