From 0ed1e8b6d801aff0b93e6b9aed449beafd718964 Mon Sep 17 00:00:00 2001
From: thefiddler <stapostol@gmail.com>
Date: Tue, 29 Apr 2014 08:48:49 +0200
Subject: [PATCH] [Win] Log wglSwapIntervalEXT errors

Note that we cannot use Marshal.GetLastWin32Error because we are not
using regular DllImports for WGL extensions.
---
 Source/OpenTK/Platform/Windows/WinGLContext.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Source/OpenTK/Platform/Windows/WinGLContext.cs b/Source/OpenTK/Platform/Windows/WinGLContext.cs
index 74a5009a..b7da272a 100644
--- a/Source/OpenTK/Platform/Windows/WinGLContext.cs
+++ b/Source/OpenTK/Platform/Windows/WinGLContext.cs
@@ -331,7 +331,10 @@ namespace OpenTK.Platform.Windows
                         {
                             value = 1;
                         }
-                        Wgl.Ext.SwapInterval(value);
+                        if (!Wgl.Ext.SwapInterval(value))
+                        {
+                            Debug.Print("wglSwapIntervalEXT call failed.");
+                        }
                     }
                 }
             }