ISCard::Transaction method

[The Transaction method is available for use in the operating systems specified in the Requirements section. The Smart Card Modules provide similar functionality.]

The Transaction method executes a write and read operation on the smart card command (application protocol data unit) object. The reply string from the smart card for the command string defined in the card that was sent to the smart card will be accessible after this function returns.

Syntax

HRESULT Transaction(
  [in, out] LPSCARDCMD *ppCmd
);

Parameters

ppCmd [in, out]

A pointer to the smart card command object.

Return value

The method returns one of the following possible values.

Remarks

In addition to the COM error codes listed above, this interface may return a smart card error code if a smart card function was called to complete the request. For more information, see Smart Card Return Values.

Examples

The following example shows executing a write and read operation on the smart card command object.

HRESULT    hr;

// pISCard is a pointer to an instance of ISCard.
// pISCardCmd is a pointer to an instance of ISCardCmd,
// and ISCardCmd::BuildCmd has already been called.
hr = pISCard->Transaction(&pISCardCmd);
if (FAILED(hr))
{
    printf("Failed ISCard::Transaction\n");
    // Take other error handling action as needed.
}

Requirements

See also

AttachByHandle

AttachByReader

Detach

get_Atr

get_CardHandle

get_Context

get_Protocol

get_Status

ISCard

LockSCard

ReAttach

UnlockSCard