Get the serial number of an opened joystick, if available.
Returns the serial number of the joystick, or NULL if it is not available.
the SDL_Joystick obtained from SDL_OpenJoystick().
The serial number of the selected joystick, or NULL if unavailable.
See Implementation
Get the serial number of an opened joystick, if available.
Returns the serial number of the joystick, or NULL if it is not available.