function DoVFTInquiry($ccno,
                          $amount,
                          $instnumber,
                          $vftcode) {

        $posnetRequest = new PosnetRequest();

        $posnetRequest->ccno = $ccno;
        $posnetRequest->amount = $amount;
        $posnetRequest->instnumber = $instnumber;
        $posnetRequest->vftcode = $vftcode;

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