title: Batch Script - Find and replace text in multiple files in a directory
body: <p>I am new to writing batch scripts. I am in need of a simple batch file that searches for a text (eg., FOO) and replaces it with another text (eg., BAR) in all the text files within a folder and it's sub-folders.</p>
  
  <p>I need to give this batch file to the user. So, it is not possible to ask the user to install anything else. Can someone please help me with this?</p>