UserInfo User = new UserInfo(sUSER, sVENDOR, sPARTNER, sPWD);

        // Create the Payflow  Connection data object with the required connection details.
        // The PAYFLOW_HOST property is defined in the App config file.
        PayflowConnectionData Connection = new PayflowConnectionData();

        // Create a new Invoice data object with the Amount, Billing Address etc. details.
        Invoice Inv = new Invoice();

        string sCardNo = txtCreditNo.Text.Trim();
        string exp = cboCCMonth.SelectedItem.Value + cboCCYear.SelectedItem.Value;

        Inv.Amt = Amt;
        Inv.Comment1 = AccountNo;
        CustomerInfo c = new CustomerInfo();
        c.CustId = AccountNo;

        Inv.CustomerInfo = c;

        // Set the Billing Address details.
        BillTo Bill = new BillTo();
        Bill.FirstName = txtCreditNameFirst.Text;
        Bill.LastName = txtCreditNameLast.Text;
        Bill.Street = txtCreditAddress.Text;
        Bill.BillToStreet2 = txtCreditAddress2.Text;
        Bill.City = txtCreditCity.Text;
        Bill.State = txtCreditState.Text;
        Bill.Zip = txtCreditZip.Text;
        Bill.CompanyName = txtCreditCompanyName.Text;
        Bill.BillToCountry = "US";
        Inv.BillTo = Bill;

        CreditCard CC = new CreditCard(sCardNo, exp);
        CC.Cvv2 = txtCreditCVV2.Text.Trim();

        // Create a new Payment Device - Credit Card data object.
        // The input parameters are Credit Card Number and Expiration Date of the Credit Card.

        // Create a new Tender - Card Tender data object.
        CardTender Card = new CardTender(CC);
       
        // Create a new Sale Transaction.
        SaleTransaction Trans = new SaleTransaction(
            User, Connection, Inv, Card, PayflowUtility.RequestId);

        // Submit the Transaction
        Response Resp = Trans.SubmitTransaction();