hotControl not working with GetMouseButton(0)

if (Input.GetMouseButton(0) && GUIUtility.hotControl == 0)

   {
   
  var dx = Input.GetAxis("Mouse X");
   
 var dy = Input.GetAxis("Mouse Y");
   
   var dV =  new Vector3(-dx * 0.15f, -dy * 0.15f,0f);
   
      var newPos = Camera.main.transform.position + dV;
   
     newPos.x = Mathf.Clamp(newPos.x, minX, maxX);
   newPos.y = Mathf.Clamp(newPos.y, minY, maxY);
   
      Camera.main.transform.position = newPos;
   
   
   

}