Validate a specific type of card in VBA

[dalefye1]

I've got some VBA code running in the sandbox and it works when I pass in a valid card # (based on the text guide).  But I cannot find any code samples which include the card type  so that if I enter:

Visa: 4111111111111111

it approves the transaction but if I enter

Mastercard: 4111111111111111

it declines the transaction.

What is the proper syntax in the below to pass the card type and have the sandbox validate for the cardtype and number?

If frm.chk_CardType Then
    post_string = post_string & "cardType=" & URLEncode(frm.cbo_CardType) & "&"
End If
post_string = post_string & "x_card_num=" & URLEncode(frm.txtCCNum) & "&"

The above code does not work, as "cardType" does not appear to be a valid parameter, and it returns "This transaction has been approved" regardless of the value of cbo_CardType

Thanks for your help

[Trevor · Accepted solution]

Hello,

We always derive the card type from the card number, so we do not have an input parameter for card type. If for some reason you would like to validate that a customer has matched the card number to a particular card type, this would have to be done outside of our system.

Thanks,

Trevor