Get the instance ID of a joystick.
Defined in SDL_joystick.h
device_index | the index of the joystick to query (the N'th joystick on the system |
Returns the instance id of the selected joystick. If called on an invalid index, this function returns -1.
This can be called before any joysticks are opened.
This function is available since SDL 2.0.6.