title: [Node JS]How to install 'ffi' and 'ref' modules on windows 10
body: <p>When I run:</p>
  
  <pre><code>npm install ffi
  </code></pre>
  
  <p>or</p>
  
  <pre><code>npm install ref
  </code></pre>
  
  <p>I got an <a href="http://i.stack.imgur.com/Hv2ma.png" rel="nofollow">this error</a></p>
  
  <p>I installed node-gyp, python 2.7.11 and Visual studio build tools.</p>
  
  <p>Anyone help me to fix this?</p>