WindowSwitch true ,false

Hello,

I am coding a video game under Unity 3D and using c#

I have a problem: I am opening a window into my game and when the player clicks on a rectangle into the window, that closes the window
here is my code :

Code (csharp):

1.     // Converted from UnityScript to C# at http://www.M2H.nl/files/js_to_c.php - by Mike Hergaarden
2. // Do test the code! You usually need to change a few small bits.
3.  
4. using UnityEngine;
5. using System;
6. using System.Data;
7. using MySql.Data.MySqlClient;  
8. using System.Collections.Generic;
9.  
10.  
11. public class Enn : MonoBehaviour {
12.     static Boolean WindowSwitch = false;
13.  
14.     void  Start (){
15.     WindowSwitch=true;
16.        
17.     }
18.    
19.        void  Update (){
20.        
21.     }
22.    
23.     void  OnGUI ()
24.        
25.     {
26.         if(WindowSwitch ==  true) {
27.        
28.        
29.             Rect windowRect = new Rect(150,150,1000,300);
30.            
31.              windowRect = GUI.Window (1, windowRect, setWindow, "Question");  
32.            
33.             }
34.     }
35.    
36.    
37.     void  setWindow ( int windowID  ){
38.        
39.         if(windowID==1){
40.        
41.             if(GUI.Label(new Rect(15,250,100,400), "moi"));
42.             {
43.                 WindowSwitch=false;
44.  
45.             }
46.            
47.     }
48.     }
49.     }
50.  

My windowSwitch== true works but when I click on "moi", the window is not closing

Could you help me please?
Thanks in advance