title: Find a string in multiple files using grep
body: <p>I have a folder with sub-folders inside, all have many types of files. I want to search for a word inside the <code>.css</code>-files. I am using Windows 7 and I have <code>grep</code>.</p>
  
  <p>How I can use <code>grep</code> to :</p>
  
  <ol>
  <li>Find pattern and print it</li>
  <li>Give file name (and path) if pattern found</li>
  </ol>