From 7cf3d2caa19da076ebd3539c8786ce62a53d35f9 Mon Sep 17 00:00:00 2001
From: Grant Limberg <grant.limberg@zerotier.com>
Date: Tue, 8 Nov 2016 16:31:07 -0800
Subject: Network list window opens with click on the menu item

---
 windows/WinUI/APIHandler.cs | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

(limited to 'windows/WinUI/APIHandler.cs')

diff --git a/windows/WinUI/APIHandler.cs b/windows/WinUI/APIHandler.cs
index f2fb1d21..9cddd916 100644
--- a/windows/WinUI/APIHandler.cs
+++ b/windows/WinUI/APIHandler.cs
@@ -19,7 +19,8 @@ namespace WinUI
 
         private string url = null;
 
-        private static APIHandler instance;
+        private static volatile APIHandler instance;
+        private static object syncRoot = new Object();
 
         public static APIHandler Instance
         {
@@ -27,7 +28,16 @@ namespace WinUI
             {
                 if (instance == null)
                 {
-
+                    lock (syncRoot)
+                    {
+                        if (instance == null)
+                        {
+                            if (!initHandler())
+                            {
+                                return null;
+                            }
+                        }
+                    }
                 }
 
                 return instance;
-- 
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