unity5 boxcast rotation / orientation

How to turn a boxcast and stay focused on its parent game object?
This is my code:

                Float m_MaxDistance;
Collider m_Collider;
bool m_HitDetect;
RaycastHit m_Hit;

void Start () {m_MaxDistance = 144.0f; }

void FixedUpdate () {
m_HitDetect = Physics.BoxCast (m_Collider.bounds.center, new Vector3 (transform.localScale.x / 2, transform.localScale.y / 2, 0.5f), transform.forward, out m_Hit, Quaternion.LookRotation (transform.forward) , m_MaxDistance);
}

Many Thanks