np_client_free np_client_new np_client_start_service np_client_t NP_DISK_USAGE_CHANGED np_error_t np_notify_cb_t np_observe_notification np_observe_notifications np_post_notification np_set_notify_callback

np_observe_notification() np_error_t np_observe_notification ( np_client_t  client, const char *  notification  ) Tells the device to send a notification on the specified event. Parameters client The client to send to notification The notifications that should be observed. Returns NP_E_SUCCESS on success, NP_E_INVALID_ARG when client or notification are NULL, or an error returned by np_plist_send.