Get the implementation-dependent GUID for the joystick.
This function requires an open joystick.
the SDL_Joystick obtained from SDL_OpenJoystick().
The GUID of the given joystick. If called on an invalid index, this function returns a zero GUID; call SDL_GetError() for more information.
SDL_GetJoystickGUIDForID SDL_GUIDToString
See Implementation
Get the implementation-dependent GUID for the joystick.
This function requires an open joystick.