Парсинг текстового файла

$strLog = "c:\fso\applog.txt" 
$e=$i=$w=0

switch -wildcard -file $strLog { 
"*error*" { $e++ }
"*info*"  { $i++ }
"*warn*"  { $w++ }
}
Write-Output "
$strLog contains the following:
      errors      $e
      warnings    $w
      information $i
"