Get The Serial Number String from a HID device.
int SDL_hid_get_serial_number_string(SDL_hid_device *dev, wchar_t *string, size_t maxlen);
|dev||A device handle returned from SDL_hid_open().|
|string||A wide string buffer to put the data into.|
|maxlen||The length of the buffer in multiples of wchar_t.|
Returns 0 on success and -1 on error.
This function is available since SDL 2.0.18.