Example of Powershell querying default MAPI client from the registry

functionGet-MAPIClient
{
    functionRemove-Argument
    {
      param
      (
        $CommandLine
      )

      $divider=''if ($('"'))
      {
        $divider='"'$CommandLine=$(1)
      }

      $($divider)[0]
    }

  $path='Registry::HKEY_CLASSES_ROOT\mailto\shell\open\command'# create new object to return values
$returnValue=1|Select-Object-PropertyHasMapiClient,Path,MailTo$=Test-Path-Path$pathif ($)
  {
    $values=Get-ItemProperty-Path$path$=$values.'(default)'$=Remove-Argument$ ((Test-Path-Path$) -eq$false)
    {
      $=$true
    }
  }

   
  $returnValue
}

Get-MAPIClient