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diff --git a/boost/asio/windows/overlapped_ptr.hpp b/boost/asio/windows/overlapped_ptr.hpp
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+++ b/boost/asio/windows/overlapped_ptr.hpp
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+//
+// windows/overlapped_ptr.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2012 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_ASIO_WINDOWS_OVERLAPPED_PTR_HPP
+#define BOOST_ASIO_WINDOWS_OVERLAPPED_PTR_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_WINDOWS_OVERLAPPED_PTR) \
+  || defined(GENERATING_DOCUMENTATION)
+
+#include <boost/asio/detail/noncopyable.hpp>
+#include <boost/asio/detail/win_iocp_overlapped_ptr.hpp>
+#include <boost/asio/io_service.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+namespace asio {
+namespace windows {
+
+/// Wraps a handler to create an OVERLAPPED object for use with overlapped I/O.
+/**
+ * A special-purpose smart pointer used to wrap an application handler so that
+ * it can be passed as the LPOVERLAPPED argument to overlapped I/O functions.
+ *
+ * @par Thread Safety
+ * @e Distinct @e objects: Safe.@n
+ * @e Shared @e objects: Unsafe.
+ */
+class overlapped_ptr
+  : private noncopyable
+{
+public:
+  /// Construct an empty overlapped_ptr.
+  overlapped_ptr()
+    : impl_()
+  {
+  }
+
+  /// Construct an overlapped_ptr to contain the specified handler.
+  template <typename Handler>
+  explicit overlapped_ptr(boost::asio::io_service& io_service,
+      BOOST_ASIO_MOVE_ARG(Handler) handler)
+    : impl_(io_service, BOOST_ASIO_MOVE_CAST(Handler)(handler))
+  {
+  }
+
+  /// Destructor automatically frees the OVERLAPPED object unless released.
+  ~overlapped_ptr()
+  {
+  }
+
+  /// Reset to empty.
+  void reset()
+  {
+    impl_.reset();
+  }
+
+  /// Reset to contain the specified handler, freeing any current OVERLAPPED
+  /// object.
+  template <typename Handler>
+  void reset(boost::asio::io_service& io_service,
+      BOOST_ASIO_MOVE_ARG(Handler) handler)
+  {
+    impl_.reset(io_service, BOOST_ASIO_MOVE_CAST(Handler)(handler));
+  }
+
+  /// Get the contained OVERLAPPED object.
+  OVERLAPPED* get()
+  {
+    return impl_.get();
+  }
+
+  /// Get the contained OVERLAPPED object.
+  const OVERLAPPED* get() const
+  {
+    return impl_.get();
+  }
+
+  /// Release ownership of the OVERLAPPED object.
+  OVERLAPPED* release()
+  {
+    return impl_.release();
+  }
+
+  /// Post completion notification for overlapped operation. Releases ownership.
+  void complete(const boost::system::error_code& ec,
+      std::size_t bytes_transferred)
+  {
+    impl_.complete(ec, bytes_transferred);
+  }
+
+private:
+  detail::win_iocp_overlapped_ptr impl_;
+};
+
+} // namespace windows
+} // namespace asio
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // defined(BOOST_ASIO_HAS_WINDOWS_OVERLAPPED_PTR)
+       //   || defined(GENERATING_DOCUMENTATION)
+
+#endif // BOOST_ASIO_WINDOWS_OVERLAPPED_PTR_HPP