How to get distance between two object by using a pinpoint? Or Tag?

[Raymund2016]

I was able to get distance of two objects using raycast but I need to get distance using the raycast to pin point one object then to another game object and get the distance between those two.

Here is a screenshot:

Here is my code so far.

using UnityEngine;
using System.Collections;

public class RaycastDistance : MonoBehaviour {

public GUIText distanceText;//This will hold the value of distance from Point A
public GUIText distanceBText;//This will hold the value of the distance from Point B
public Transform other;

private float distance;

void Start ()
{
	distance = 0;//Distance initial value set to 0
	SetDistanceText ();//Use to call the function SetDistanceText
	distanceBText.text = "";

}

// Update is called once per frame
void Update ()
{

	RaycastHit hit;
	Vector3 up = transform.TransformDirection (Vector3.forward);//This where the raycast should point either forward,up,down,etc.0
	Debug.DrawRay (transform.position, up * 100, Color.green);//Raycast draws line in green

	if (Physics.Raycast (transform.position, up, out hit)) 
	{
		distance = hit.distance;
		distanceText.text = "Distance: " + distance.ToString();
		distanceBText.text = "YOU GOT THE DISTANCE MEASUREMENT!!";
		Debug.Log("This distance is " + hit.distance);
	}

}

void SetDistanceText()
{
	distanceText.text = "Distance: " + distance.ToString();
}

}

Please really need help. Thanks.

[system]

It may be better to have the raycast simply return and store the transform of the last two objects selected. Then you can do the following once both transforms are assigned;

distance = (target.position - source.position).magnitude;