Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_MouseDeviceEvent - Mouse device event structure (event.mdevice.*)
SYNOPSIS
#include <SDL3/SDL_events.h>
typedef struct SDL_MouseDeviceEvent
{
SDL_EventType type; /**< SDL_EVENT_MOUSE_ADDED or SDL_EVENT_MOUSE_REMOVED */
Uint32 reserved;
Uint64 timestamp; /**< In nanoseconds, populated using SDL_GetTicksNS() */
SDL_MouseID which; /**< The mouse instance id */
} SDL_MouseDeviceEvent;
AVAILABILITY
This struct is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_MouseDeviceEvent(3type)