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diff --git a/boost/detail/winapi/detail/cast_ptr.hpp b/boost/detail/winapi/detail/cast_ptr.hpp
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+++ b/boost/detail/winapi/detail/cast_ptr.hpp
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+//  cast_ptr.hpp  --------------------------------------------------------------//
+
+//  Copyright 2015 Andrey Semashev
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  See http://www.boost.org/LICENSE_1_0.txt
+
+
+#ifndef BOOST_DETAIL_WINAPI_DETAIL_CAST_PTR_HPP
+#define BOOST_DETAIL_WINAPI_DETAIL_CAST_PTR_HPP
+
+#include <boost/detail/winapi/config.hpp>
+
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
+namespace boost {
+namespace detail {
+namespace winapi {
+namespace detail {
+
+//! This class is used to automatically cast pointers to the type used in the current Windows SDK function declarations
+class cast_ptr
+{
+private:
+    const void* m_p;
+
+public:
+    explicit BOOST_FORCEINLINE cast_ptr(const void* p) BOOST_NOEXCEPT : m_p(p) {}
+    template< typename T >
+    BOOST_FORCEINLINE operator T* () const BOOST_NOEXCEPT { return (T*)m_p; }
+};
+
+}
+}
+}
+}
+
+#endif // BOOST_DETAIL_WINAPI_DETAIL_CAST_PTR_HPP