title: How do I specify include directories using NMake?
body: <p>I'm trying to use nmake to build the libfcg (<a href="http://www.fastcgi.com/" rel="nofollow noreferrer">http://www.fastcgi.com/</a>), however I'm getting the following error:</p>
  
  <pre><code>..\include\fcgios.h(23) : fatal error C1083: Cannot open include file: 'windows.h': No such file or directory
  </code></pre>
  
  <p>I have the Widows SDK installed and the Windows.h file is present in this directory:</p>
  
  <pre><code>C:\Program Files\Microsoft SDKs\Windows\v7.0A\Include
  </code></pre>
  
  <p>How can I specify this as an include directory?</p>