title: vbs or bat to search file in a specified directory and open file based off of extension, then find and replace string
body: <p>We have a program that installs a config document in <code>%appdata%\Roaming\</code>.
  I need a script that I can push out via GPO that will do the following:</p>
  
  <ul>
  <li>Search a specified directory by file extension</li>
  <li>Search all files of specified extension for a string</li>
  <li>Change this string with another string</li>
  </ul>
  
  <p>fin.</p>
  
  <p>I attempted to start learning Visual Basic for this, but I feel vastly out of 
  my element, as I've done nothing like this before.</p>