Provided by: libsdl3-doc_3.2.26+ds-2_all 

NAME
SDL_TouchID - A unique ID for a touch device.
SYNOPSIS
#include <SDL3/SDL_touch.h>
typedef Uint64 SDL_TouchID;
DESCRIPTION
This ID is valid for the time the device is connected to the system, and is never reused for the lifetime
of the application.
The value 0 is an invalid ID.
AVAILABILITY
This datatype is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.26 SDL_TouchID(3type)