I've translated it:
Dim $strComputerName, $strOU

; Get the computerName of PC
$strComputerName = @WKSTA

; Call function to find OU from computer name
$strOU = GetOUByComputerName($strComputerName)

? $strOU

Function GetOUByComputerName($strComputerName)
  ; *** Function to find ou/container of computer object from computer name ***

  Dim $strNamingContext, $strFilter
  Dim $objConnection, $objCommand, $objRecordSet, $objRootDSE
  Dim $aR, $R, $C, $x

  ; Bind to the RootDSE to get the default naming context for
  ; the domain.  e.g. dc=wisesoft,dc=co,dc=uk
  $objRootDSE = GetObject("LDAP://RootDSE")
  $strNamingContext = $objRootDSE.Get("defaultNamingContext")
  $objRootDSE = ""

  ; Construct an ldap filter to search for a computer object
  ; anywhere in the domain with a name of the value specified.
  $strFilter = "<LDAP://"+$strNamingContext+">;(&(objectClass=Computer)(name="+$strComputerName+"));distinguishedName;subtree"

  ; Standard ADO code to query database
  $objConnection = CreateObject("ADODB.Connection")
  $objCommand = CreateObject("ADODB.Command")

  $objConnection.Provider = "ADsDSOObject"
  $objConnection.Open("Active Directory Provider")
  $objCommand.activeconnection = $objConnection
  $objCommand.commandtext = $strFilter

  $objRecordSet = $objCommand.Execute
  $aR = $objRecordSet.GetRows()
  Dim $aFR[Ubound($aR,2),Ubound($aR,1)]
  For $R=0 to Ubound($aR,2)
    For $C=0 to Ubound($aR,1)
      If $x=0
        $getOUByComputerName = $aFR[$R,$C]


Edited by Arend_ (2012-08-31 06:13 PM)
Edit Reason: Translated, Cleaned up, and made it work.