From 140a278b3eee917a1fcac0efa930d4f3c5bfbc80 Mon Sep 17 00:00:00 2001
From: the_fiddler <the_fiddler@ebc5dd9b-fb1d-0410-b6f8-d24c324e9604>
Date: Fri, 3 Dec 2010 12:29:01 +0000
Subject: [PATCH] Do not try to register device when device description is
 empty.

---
 Source/OpenTK/Platform/Windows/WinRawKeyboard.cs | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs b/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs
index ecf3e0df..9b2a1989 100644
--- a/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs
+++ b/Source/OpenTK/Platform/Windows/WinRawKeyboard.cs
@@ -103,7 +103,16 @@ namespace OpenTK.Platform.Windows
                         RegistryKey regkey = GetRegistryKey(name);
                         string deviceDesc = (string)regkey.GetValue("DeviceDesc");
                         string deviceClass = (string)regkey.GetValue("Class");
-                        deviceDesc = deviceDesc.Substring(deviceDesc.LastIndexOf(';') + 1);
+
+                        if (String.IsNullOrEmpty(deviceDesc))
+                        {
+                            Debug.Print("[Warning] Failed to retrieve device description, skipping this device.");
+                            continue;
+                        }
+                        else
+                        {
+                            deviceDesc = deviceDesc.Substring(deviceDesc.LastIndexOf(';') + 1);
+                        }
 
                         if (!String.IsNullOrEmpty(deviceClass) && deviceClass.ToLower().Equals("keyboard"))
                         {