diff --git a/rfb_win32/MonitorInfo.h b/rfb_win32/MonitorInfo.h
new file mode 100644
index 0000000..acf2775
--- /dev/null
+++ b/rfb_win32/MonitorInfo.h
@@ -0,0 +1,72 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+// Helper class used to obtain information about a particular monitor.
+// This class wraps the Windows MONITORINFOEX ASCII structure, providing
+// methods that can safely be called on both multi-monitor aware systems
+// and older "legacy" systems.
+
+
+#ifndef __RFB_WIN32_MONITORINFO_H__
+#define __RFB_WIN32_MONITORINFO_H__
+
+#include <windows.h>
+#ifdef MONITOR_DEFAULTTONULL
+#define RFB_HAVE_MONITORINFO
+#endif
+
+namespace rfb {
+  namespace win32 {
+
+    // Structure containing info on the monitor nearest the window.
+    // Copes with multi-monitor OSes and older ones.
+#ifdef RFB_HAVE_MONITORINFO
+    struct MonitorInfo : MONITORINFOEXA {
+#else
+    struct MonitorInfo {
+      DWORD cbSize;
+      RECT rcMonitor;
+      RECT rcWork;
+      DWORD dwFlags;
+      char szDevice[1]; // Always null...
+#endif
+
+      // Constructor: Obtains monitor info for the monitor that has the
+      //   greatest overlap with the supplied window or rectangle.
+      MonitorInfo(HWND hwnd);
+      MonitorInfo(const RECT& r);
+
+      // Constructor: Obtains monitor info for the name monitor.  Monitor
+      //   names should be those obtained from the MonitorInfo
+      //   szDevice field, and usually look like "\\.\DISPLAY<n>"
+      MonitorInfo(const char* devName);
+
+      // Move the specified window to reside on the monitor.
+      void moveTo(HWND handle);
+
+      // Clip the specified rectangle or window to the monitor's working area.
+      //   The rectangle/window is moved so that as much as possible resides
+      //   on the working area of the monitor, and is then intersected with it.
+      void clipTo(HWND handle);
+      void clipTo(RECT* r);
+    };
+
+  };
+};
+
+#endif