title: How to enable visual styles without a manifest
body: <p>According to the <a href="http://msdn.microsoft.com/en-us/library/bb773187.aspx" rel="noreferrer">docs</a>:</p>
  
  <p><em>"If you want your application to use ComCtl32.dll version 6, you must add an application manifest <strong>or compiler directive</strong> to specify that version 6 should be used if it is available."</em></p>
  
  <p>Notice the logical OR above? So what is this mysterious compiler directive?</p>
  
  <p>I've got a native Win32 C++ application that is wholly contained in a single .cpp file. There are no resource files, manifest files, etc. I'd like to keep it that way, but I would also like to use visual styles.</p>