title: NSIS Find all .txt files
body: <p>I currently have a check to find all text files in $INSTDIR, shown below.</p>
  
  <p>However, there could potentially be subdirectories, such as $INSTDIR\mySub, which contains additional .txt files.  Is there a way to keep a similar loop structure but search all subdirectories as well?</p>
  
  <pre><code>FindFirst $R0 $R1 "$INSTDIR\*.txt"
  IfErrors ExitInstaller 0
  LoopIt:
    Messagebox MB_OK "Do some processing on $R1"
    FindNext $R0 $R1
    IfErrors 0 LoopIt
  </code></pre>