title: Sleep identifier not found visual studio 2017
body: <p>Just as mentioned in the documentation as well as online forums, I've used the Sleep function in the following way:</p>
  
  <pre><code>#include &lt;windows.h&gt;
  ...
  Sleep(4)
  </code></pre>
  
  <p>Still I'm getting the build error:</p>
  
  <pre><code>'Sleep': identifier not found
  </code></pre>
  
  <p>I'm using Visual Studio 2017 on Windows 10</p>