ISCardDatabase::ListCardInterfaces method

Стаття
01/07/2021

[The ListCardInterfaces 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 ListCardInterfaces method retrieves the identifiers (GUIDs) of all the interfaces supported for the specified smart card.

Syntax

HRESULT ListCardInterfaces(
  [in]  BSTR        bstrCardName,
  [out] LPSAFEARRAY *ppInterfaceGuids
);

Parameters

bstrCardName [in]: Name of the smart card.
ppInterfaceGuids [out]: Pointer to the interface GUIDs if successful; NULL if operation failed.

Return value

The method returns one of the following possible values.

Return code	Description
S_OK	Operation completed successfully.
E_INVALIDARG	Invalid parameter.
E_POINTER	A bad pointer was passed in ppInterfaceGuids.
E_OUTOFMEMORY	Out of memory.

Remarks

To retrieve the primary service provider of the smart card, call GetProviderCardId.

To retrieve all known smart cards, readers, and reader groups call ListCards, ListReaders, and ListReaderGroups respectively.

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

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 retrieving the identifiers of the interfaces supported for the specified smart card.

BSTR         bstrCard = NULL;
LPSAFEARRAY  pGuids = NULL;
HRESULT      hr;

bstrCard = SysAllocString(L"GemSAFE");
// Call the function for the specified card.
hr = pISCDataBase->ListCardInterfaces(bstrCard,
                                      &pGuids);
if (FAILED(hr))
{
   printf("Failed ListCardInterfaces\n");
   // Take other error handling action as needed.
}
else
{
   // Use the safe array as needed.
   // ...
   // Free BSTR when done.
   if (bstrCard)
       SysFreeString(bstrCard);
}

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	Scardmgr.h
Type library	Scardmgr.tlb
DLL	Scardssp.dll
IID	IID_ISCardDatabase is defined as 1461AAC8-6810-11D0-918F-00AA00C18068

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