title: how to use regular expression for notepad++ for $1
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/5840897/find-and-replace-in-notepad-using-regular-expression">Find and Replace in Notepad++ using Regular Expression</a>  </p>
  </blockquote>
  
  
  
  <p>how to use regular expression for notepad++ for $1<br>
  when i use php ,I usually write it like this:<br>
  preg_replace("@aa(.*)bb@",$1,$str), but $1 is not wooking in notepad++<br>
  <img src="https://i.stack.imgur.com/wn85s.png" alt="enter image description here"></p>