Register for an event notification.
    @param p_event_manager: the event manager to which you want to attach to. Generally it is obtained by vlc_my_object_event_manager() where my_object is the object you want to listen to.
    @param i_event_type: the desired event to which we want to listen.
    @param f_callback: the function to call when i_event_type occurs.
    @param user_data: user provided data to carry with the event.
    @return: 0 on success, ENOMEM on error.

def libvlc_event_attach(p_event_manager, i_event_type, f_callback, user_data):
    '''Register for an event notification.
    @param p_event_manager: the event manager to which you want to attach to. Generally it is obtained by vlc_my_object_event_manager() where my_object is the object you want to listen to.
    @param i_event_type: the desired event to which we want to listen.
    @param f_callback: the function to call when i_event_type occurs.
    @param user_data: user provided data to carry with the event.
    @return: 0 on success, ENOMEM on error.
    '''
    f = _Cfunctions.get('libvlc_event_attach', None) or \
        _Cfunction('libvlc_event_attach', ((1,), (1,), (1,), (1,),), None,
                    ctypes.c_int, EventManager, ctypes.c_uint, Callback, ctypes.c_void_p)
    return f(p_event_manager, i_event_type, f_callback, user_data)