deskew.ps1

$input_folder = "C:\ScannedPDFS\"
$output_folder = "C:\ScannedPDFS\Deskewed\{0}"

### SET FOLDER TO WATCH + FILES TO WATCH + SUBFOLDERS YES/NO
    $watcher = New-Object System.IO.FileSystemWatcher
    $watcher.Path = $input_folder
    $watcher.Filter = "*.pdf"
    $watcher.IncludeSubdirectories = $false
    $watcher.EnableRaisingEvents = $true 

### DEFINE ACTIONS AFTER A EVENT IS DETECTED

    $action = {
      param($sender, $eventArgs)
      $in_file = $eventArgs.FullPath
      $out_file = $output_folder -f (Split-Path -Leaf $inFile)
      pdfdwcmd.exe $in_file $out_file
    }    

### DECIDE WHICH EVENTS SHOULD BE WATCHED + SET CHECK FREQUENCY  
    $created = Register-ObjectEvent $watcher "Created" -Action $action
    $changed = Register-ObjectEvent $watcher "Changed" -Action $action
    $renamed = Register-ObjectEvent $watcher "Renamed" -Action $action
    while ($true) {sleep 5}