diff -r 000000000000 -r 6474c204b198 widget/windows/nsdefs.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/nsdefs.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef NSDEFS_H
+#define NSDEFS_H
+
+#include <windows.h>
+
+#ifdef _DEBUG
+  #define BREAK_TO_DEBUGGER           DebugBreak()
+#else   
+  #define BREAK_TO_DEBUGGER
+#endif  
+
+#ifdef _DEBUG
+  #define VERIFY(exp)                 if (!(exp)) { GetLastError(); BREAK_TO_DEBUGGER; }
+#else   // !_DEBUG
+  #define VERIFY(exp)                 (exp)
+#endif  // !_DEBUG
+
+// NSPR Win32 modules:
+// nsWindow, nsSound, and nsClipboard
+//
+// Logging can be changed at runtime without recompiling in the General
+// property page of Visual Studio under the "Environment" property.
+//
+// Two variables are of importance to be set: 
+// NSPR_LOG_MODULES and NSPR_LOG_FILE
+//
+// NSPR_LOG_MODULES:
+// NSPR_LOG_MODULES=all:5         (To log everything completely)
+// NSPR_LOG_MODULES=nsWindow:5,nsSound:5,nsClipboard:5 
+//                                (To log windows widget stuff)
+// NSPR_LOG_MODULES=              (To turn off logging)
+//
+// NSPR_LOG_FILE:
+// NSPR_LOG_FILE=C:\nsprlog.txt   (To a file on disk)
+// NSPR_LOG_FILE=WinDebug         (To the debug window)
+// NSPR_LOG_FILE=                 (To stdout/stderr)
+
+#endif  // NSDEFS_H
+
+