title: Compile Errors upgrading ATL project from vs2010 to vs2013
body: <p>When including atlwin.h from the Microsoft ATL libraries in Visual Studio 2013 building may result in numerous complier errors about undefined elements.</p>
  
  <pre><code>HMONITOR is not defined
  </code></pre>
  
  <p>This does not occur when building using VS2010.</p>
  
  <p>As this is a standard MS header file the missing class errors do not seems to make sense.</p>