Click on a button that is created post start.

Basically I have buttons on a gui that are only created After you start the game (to be specific when you pick up items) and I want it so when you right click that object in the inventory it does something (Later on it will have a menu to eat drop w/e) but I can't seem to wrap my head around it.

Here is the script:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 [AddComponentMenu("Camera-Control/Mouse Look")]
 public class BaseGirlControl : MonoBehaviour {
     // Health & Heat
     
     public int maxhealth = 100;
     public int curhealth = 100;
     private float healthbarlength;
     
     public int maxheat = 100;
     public int curheat = 100;
     private float heatbarlength;
     
     public Transform GameController;
     
     private bool rendermenu;
     
     
     // movement
     
     public float animSpeed = 1.5f;
     public float speed = 10.0f;
     public float RotationSpeed = 100;
     private Animator anim;
     
     // in hand items
     
     public string pickupTag;
     private Transform pickuploc;
     private Transform rightPalmloc;
     private bool RightHandEquip;
     public bool collideweapon;
     
     // Non in-hand items
     
     public List<string> NearbyItems = new List<string>();
     
     private RaycastHit hit;
     private Ray ray;
     private Transform ItemHolder;
     
     public GameObject[] InventorySlots = new GameObject[6];
     private Rect windowRect = new Rect(10, 300, 104, 450);
     
     public Texture2D DefaultItemIcon;
     
     // Use this for initialization
     void Start () {
         pickupTag = null;
         anim = GetComponent<Animator>();    
         RightHandEquip = false;
         collideweapon = false;
     }
 
     
     // Update is called once per frame
     void Update () {
         HandlesGUI hg = (HandlesGUI)GameController.GetComponent("HandlesGUI");
         if (hg.Rendermenu == true)
         {
             rendermenu = true;
         }
         else
         {
             rendermenu = false;
         }
         AddjustCurrentHealth(0);
         AddjustCurrentHeat(0);
         float h = Input.GetAxis("Horizontal");
         float v = Input.GetAxis("Vertical");
         anim.speed = animSpeed;
         if(rendermenu == false)
         {
             anim.SetFloat("Speedz", v);            
             anim.SetFloat("Speedx", h);
             transform.Rotate(0, Input.GetAxis("Mouse X"), 0 * Time.deltaTime * speed);
         }
         if(rendermenu == true)
         {
             anim.SetFloat("Speedz", 0);            
             anim.SetFloat("Speedx", 0);
         }
 
         
         
         
         // Handles weapons / In hand items
         
         
         if (Input.GetButton("InteractionKey"))
         {
             if (collideweapon == true)
             {
                 if (pickupTag != null)
                 {
                     pickuploc = GameObject.FindWithTag(pickupTag).transform;
                     pickuploc.GetComponent<WeaponControl>().ispickedup = true;
                     rightPalmloc = GameObject.FindWithTag("GrippingHand").transform;
                     pickuploc.transform.parent = rightPalmloc.transform;
                     RightHandEquip = true;
                 }
             }
         }
         if (Input.GetButton("DropWeaponKey"))
         {
             if (RightHandEquip == true)
             {
                 pickuploc = GameObject.FindWithTag(pickupTag).transform;
                 pickuploc.GetComponent<WeaponControl>().ispickedup = false;
                 RightHandEquip = false;
             }
         }
         
         // Handles Clicking in gui mode to pick up items
         
         if(rendermenu == true)
         {
             ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             if(Input.GetButtonDown("Fire1"))
             {
                 if(Physics.Raycast(ray,out hit,20))
                 {
                     if(NearbyItems.Contains(hit.collider.tag))
                     {
                         for(int i = 0; i < InventorySlots.Length; i++)
                         {
                             if(InventorySlots[i] == null)
                             {
                                 ItemControl item = (ItemControl)hit.collider.gameObject.GetComponent<ItemControl>();
                                 InventorySlots[i] = hit.collider.gameObject;
                                 item.ispickedup = true;
                                 ItemHolder = GameObject.FindWithTag(item.SlotTag).transform;
                                 InventorySlots[i].transform.parent = ItemHolder.transform;
                                 break;
                             }
                             else
                             {
                                 Debug.Log("YO INVENTORY FULL SON!");
                             }
                         }
                     }
                 }    
             }
         }
     }
     void OnGUI ()
     {
         // Health system
         if (rendermenu == true)
         {
             GUI.Box(new Rect(10, 10, 120, 20), "Health");
             GUI.Box(new Rect(10, 30, healthbarlength, 20), curhealth + "/" + maxhealth);
             
             GUI.Box(new Rect(10, 50, 120, 20), "Heat");
             GUI.Box(new Rect(10, 70, heatbarlength, 20), curheat + "/" + maxheat);
             
             // Calls Inventory GUI
             
             windowRect = GUI.Window(0, windowRect, Domywindow, "Inventory" );
         }
     }
     
     // Health system
     
     public void AddjustCurrentHealth(int adj) {
         curhealth += adj;
     
         if(curhealth < 0)
             curhealth = 0;
         
         if(curhealth > maxhealth)
             curhealth = maxhealth;
         
         if(maxhealth < 1)
             maxhealth = 1;
         
         healthbarlength = (Screen.width / 2) * (curhealth / (float)maxhealth);
         
         if(curhealth == 0)
             Application.LoadLevel("MainMenu");
     }
     
     public void AddjustCurrentHeat(int adjh) {
         curheat += adjh;
     
         if(curheat < 0)
             curheat = 0;
         
         if(curheat > maxheat)
             curheat = maxheat;
         
         if(maxheat < 1)
             maxheat = 1;
         
         heatbarlength = (Screen.width / 2) * (curheat / (float)maxheat);
         
         if(curheat == 0)
             Debug.Log("Heatcold");
     }
     
     // Inventory Gui
     
     void Domywindow(int windowId)
     {
         int y = 20;
         GUI.DragWindow(new Rect(0,0,300,20));
         for(int i = 0; i < InventorySlots.Length; i++)
         {
             if(InventorySlots[i] != null)
             {
                 ItemControl v1c = (ItemControl)InventorySlots[i].gameObject.GetComponent<ItemControl>();
                 if(InventorySlots[i].tag != null)
                 {
                     GUI.Button(new Rect(20,y,64,64),v1c.icon);
                     y += 70;
                 }
             }
             else
             {
                 GUI.Button(new Rect(20,y,64,64),DefaultItemIcon);
                 y += 70;
             }
         }
         
     }
 }

Don't think you'll be needing this but here is the item script:

     public bool ispickedup;
     public Texture2D icon;
     public GameObject Player;
     public string SlotTag;
     
     // Use this for initialization
     void Start () {
         ispickedup = false;
     }
     
     void OnTriggerEnter(Collider collide) 
     {
         if (collide.gameObject.tag == "Player")
         {
             BaseGirlControl bgc = (BaseGirlControl)Player.GetComponent("BaseGirlControl");
             if(bgc.NearbyItems.Contains(tag))
             {
             }
             else
             {
                 bgc.NearbyItems.Add(tag);
             }
         }
     }
     
     void OnTriggerExit(Collider collide) 
     {
         if (collide.gameObject.tag == "Player")
         {
             BaseGirlControl bgc = (BaseGirlControl)Player.GetComponent("BaseGirlControl");
             if(bgc.NearbyItems.Contains(tag))
             {
                 bgc.NearbyItems.Remove(tag);
             }
         }
     }
     
     
     // Update is called once per frame
     void Update () {
         if (ispickedup == true)
         {
             Held();
         }
         
         if (ispickedup == false)
         {
             Drop();
         }
     }
     
     void Held()
     {
         SphereCollider sc = GetComponent<SphereCollider>();
         BoxCollider bc = GetComponent<BoxCollider>();
         transform.localPosition = new Vector3(0, 0, 0);
         transform.localRotation = Quaternion.identity;
         rigidbody.Sleep();
         sc.enabled = false;
         bc.enabled = false;
         gameObject.renderer.enabled = false;
     }
     
     void Drop()
     {
         SphereCollider sc = GetComponent<SphereCollider>();
         BoxCollider bc = GetComponent<BoxCollider>();
         rigidbody.WakeUp();
         sc.enabled = true;
         bc.enabled = true;
         gameObject.renderer.enabled = true;
     }
 }

Thoughts?

I'm off to work, be back later.