From bba71c37822077390bc7e5b2b62fb5d27fed287d Mon Sep 17 00:00:00 2001
From: Frank Skare <frank.skare.de@gmail.com>
Date: Sun, 23 May 2021 22:21:59 +0200
Subject: [PATCH] fix #249

---
 src/Native/Native.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Native/Native.cs b/src/Native/Native.cs
index 93d587f..2ba9dbf 100644
--- a/src/Native/Native.cs
+++ b/src/Native/Native.cs
@@ -149,7 +149,7 @@ namespace mpvnet
 
         public static int GetDPI(IntPtr hwnd)
         {
-            if (Environment.OSVersion.Version >= Windows_10_1607)
+            if (Environment.OSVersion.Version >= Windows_10_1607 && hwnd != IntPtr.Zero)
                 return GetDpiForWindow(hwnd);
             else
                 using (Graphics gx = Graphics.FromHwnd(hwnd))