title: What provides Microsoft Visual Studio 10.0\VC\include\io.h?
body: <p>I installed Visual Studio 2010 and that gave me the C++ compiler</p>
  
  <pre><code>C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat
  </code></pre>
  
  <p>However when I tried to build an app (a Python package), I got an error about missing</p>
  
  <pre><code>C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\io.h
  </code></pre>
  
  <p>On investigation, that <code>include</code> folder is almost empty (just three files).</p>
  
  <p>What bit of Windows / Visual Studio do I need to install to populate the include folder?</p>
  
  <hr>
  
  <p>What I'm trying to do:</p>
  
  <pre><code>pip install lxml
  </code></pre>
  
  <p>What happens</p>
  
  <blockquote>
    <p>Building lxml version 3.3.5.<br>
    Building without Cython.<br>
    C:\Python34\include\pyconfig.h(68) : fatal error C1083: Cannot open include file: 'io.h': No such file or directory</p>
  </blockquote>