ISCardCmd::get_P1 method

[The get_P1 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_P1 method retrieves the first parameter (P1) byte from the application protocol data unit (APDU).

Syntax


HRESULT get_P1(
  [out]  BYTE *pbyP1
);

Parameters

pbyP1 [out]

Pointer to the P1 byte in the APDU on return.

Return value

The method returns one of the following possible values.

Return codeDescription
S_OK

Operation completed successfully.

E_INVALIDARG

The pbyP1 parameter is not valid.

E_POINTER

A bad pointer was passed in pbyP1.

E_OUTOFMEMORY

Out of memory.

 

Remarks

To set the P1 parameter to a new value, call put_P1.

To get the P2 or P3 parameters, call get_P2 and get_P3 respectively.

For a list of all the methods provided by this 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 more information, see Smart Card Return Values.

Examples

The following example shows how to retrieve the first parameter (P1) byte from the application protocol data unit (APDU). The example assumes that pISCardCmd is a valid pointer to an instance of the ISCardCmd interface.


BYTE  byP1;
HRESULT  hr;

// Retrieve the P1 byte.
hr = pISCardCmd->get_P1(&byP1);
if (FAILED(hr))
{
  printf("Failed get_P1\n");
  // Take other error handling action as needed.
}


Requirements

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

See also

get_P2
get_P3
ISCardCmd
put_P1

 

 

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