How to draw a line in scene view by pressing and then dragging with the mouse?

Hi,

I would like to be able to draw a line between 2 gameobjects in sceneview. I have managed to detect the first click on the first object but when I drag unity starts to paint the selection box like it ussually does instead of my line.

Here the code I'm using:

 using UnityEngine;
 using UnityEditor;
 
 [CustomEditor(typeof(TriggerEventEmitter))]
 public class EventBinding : Editor
 {
     // draw lines between a chosen game object
     // and a selection of added game objects
     Transform starting = null;
 
     void OnSceneGUI()
     {
         // get the chosen game object
         TriggerEventEmitter t = target as TriggerEventEmitter;
 
         if (t == null)
             return;
 
         Event e= Event.current;
         if(e.type == EventType.MouseDown)
         {
             Vector2 pos = Event.current.mousePosition;
             Ray ray = HandleUtility.GUIPointToWorldRay(pos);
             RaycastHit2D hit2d = Physics2D.GetRayIntersection(ray,Mathf.Infinity);
 
             if (hit2d.collider != null)
             {
                 starting = hit2d.collider.transform;
                 Debug.Log("Yeah");
                 Event.current.Use();
 
                 if (Event.current.type == EventType.Layout)
                 {
                     HandleUtility.AddDefaultControl(0);
                 }
             }
         }
         else if(e.type==EventType.MouseDrag)
         {
             Color c = Handles.color;
             Handles.color = Color.cyan;
             Handles.DrawLine(starting.position, e.mousePosition);
             Handles.color = c;
             Event.current.Use();
 
 
         }
 
         
     }
 }

Could anybody give any tip on this?

Thanks.