function DoPointUsageTran($ccno,
                              $expdate,
                              $orderid,
                              $amount,
                              $currency) {

        $posnetRequest = new PosnetRequest();

        $posnetRequest->ccno = $ccno;
        $posnetRequest->expdate = $expdate;
        $posnetRequest->orderid = $orderid;
        $posnetRequest->amount = $amount;
        $posnetRequest->currency = $currency;

        return $this->DoTran($posnetRequest, "pointusage");
    }