ISCardCmd::get_Apdu method

Artikel
01/07/2021

[The get_Apdu method is available for use in the operating systems specified in the Requirements section. It is not available for use in Windows Server 2003 with Service Pack 1 (SP1) and later, Windows Vista, Windows Server 2008, and subsequent versions of the operating system. The Smart Card Modules provide similar functionality.]

The get_Apdu method retrieves the raw application protocol data unit (APDU).

Syntax

HRESULT get_Apdu(
  [out] LPBYTEBUFFER *ppApdu
);

Parameters

ppApdu [out]: Pointer to the byte buffer mapped through an IStream object that contains the APDU message on return.

Return value

The method returns one of the following possible values.

Return code	Description
S_OK	Operation completed successfully.
E_INVALIDARG	The ppApdu parameter is not valid.
E_POINTER	A bad pointer was passed in ppApdu.
E_OUTOFMEMORY	Out of memory.

Remarks

To copy the APDU from an IByteBuffer (IStream) object into the APDU wrapped in this interface object, call put_Apdu.

To determine the length of the APDU, call get_ApduLength.

For a list of all the methods provided by the ISCardCmd interface, see ISCardCmd.

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 information about smart card error codes, see Smart Card Return Values.

Examples

The following example shows how to retrieve the raw application protocol data unit (APDU). The example assumes that pISCardCmd is a valid pointer to the ISCardCmd interface, and that pIByteApdu is a valid pointer to an instance of the IByteBuffer interface.

HRESULT    hr;

hr = pISCardCmd->get_Apdu(&pIByteApdu);
if (FAILED(hr)) 
{
    printf("Failed get_Apdu.\n");
    // Take other error handling action as needed.
}

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
End of client support	Windows XP
End of server support	Windows Server 2003
Header	Scarddat.h
Type library	Scarddat.tlb
DLL	Scardssp.dll
IID	IID_ISCardCmd is defined as D5778AE3-43DE-11D0-9171-00AA00C18068

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