Checks whether a pen is still attached.
SDL_bool SDL_PenConnected(SDL_PenID instance_id);
|instance_id||A pen ID.|
Returns SDL_TRUE if "instance_id" is valid and the corresponding pen is attached, or SDL_FALSE otherwise.
If a pen is detached, it will not show up for ::SDL_GetPens(). Other operations will still be available but may return default values.
This function is available since SDL 3.0.0