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copied!<p><code>HANDLE</code> is a Windows-API-specific data type defined in <code>winnt.h</code>. According to the <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa383751.aspx#HANDLE" rel="nofollow">MSDN</a>,</p> <blockquote> <p>A handle to an object. This type is declared in <code>WinNT.h</code> as follows:</p> <pre><code>typedef PVOID HANDLE; </code></pre> </blockquote> <p>So, now we see that <code>HANDLE</code> is really just <code>void *</code> -- representing a handle to an object. Think about what it is that you're trying to do; does it make sense to serialize a <em>pointer</em> to some object in the Windows API?</p> <p>Instead, try to serialize what it takes to retrieve an equivalent <code>HANDLE</code>; judging by the name of the member, I'm going to guess you used <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa363858.aspx" rel="nofollow"><code>CreateFile</code></a> -- so, you'll need to know...</p> <ul> <li>The file name</li> <li>The desired access (e.g. <code>GENERIC_READ | GENERIC_WRITE</code>)</li> <li>The share mode (e.g. <code>FILE_SHARE_DELETE</code>)</li> <li>Optionally, the security attributes</li> <li>The creation disposition (i.e. <code>CREATE_NEW</code>, <code>TRUNCATE_EXISTING</code>, etc.)</li> <li>The file or device flags and attributes </li> <li>Optionally, a template file -- for copying its attributes when creating a file</li> </ul> <hr> <p>Now, if you <em>really</em> don't want to be doing that -- you're <strong>positive</strong> you want the pointer value -- maybe try serializing it after casting via <a href="http://en.cppreference.com/w/cpp/language/reinterpret_cast" rel="nofollow"><code>reinterpret_cast</code></a> to <code>std::intptr_t</code> or <code>std::uintptr_t</code> (as <em>might</em> be defined in <code>cstdint</code> as of C++11).</p> <pre><code>ar & reinterpret_cast<std::intptr_t>(file); </code></pre> <p>... then you should couple this with something as follows (when deserializing):</p> <pre><code>std::intptr_t _file; ar & _file; HANDLE file = std::reinterpret_cast<HANDLE>(_file); </code></pre>

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