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SCardStatus
..msdn Add comment W32 Constants Translate this page |
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Provides the current status of a smart card in a reader. |
| | | Code examples: | | |
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| | | Declaration: | | |
LONG SCardStatus(
__in SCARDHANDLE hCard,
__out LPTSTR szReaderName,
__inout LPDWORD pcchReaderLen,
__out LPDWORD pdwState,
__out LPDWORD pdwProtocol,
__out LPBYTE pbAtr,
__inout LPDWORD pcbAtrLen
);
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| | | | FoxPro declaration: | | |
DECLARE LONG SCardStatus IN Winscard;
INTEGER hCard,;
STRING @szReaderName,;
LONG @pcchReaderLen,;
LONG @pdwState,;
LONG @pdwProtocol,;
STRING @pbAtr,;
LONG @pcbAtrLen
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| | | | Parameters: | | hCard [in]
Reference value returned from SCardConnect.
szReaderName [out]
List of display names (multiple string) by which the currently connected reader is known.
pcchReaderLen [in, out]
On input, supplies the length of the szReaderName buffer.
pdwState [out]
Current state of the smart card in the reader.
pdwProtocol [out]
Current protocol, if any.
pbAtr [out]
Pointer to a 32-byte buffer that receives the ATR string from the currently inserted card, if available.
pcbAtrLen [in, out]
On input, supplies the length of the pbAtr buffer. On output, receives the number of bytes in the ATR string (32 bytes maximum).
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| | | Return value: | | | Returns SCARD_S_SUCCESS (0) or error code. |
| | | Usage: | |
nReaderNamesLen=512
cReaderNames = REPLICATE(CHR(0), nReaderNamesLen)
nAttribLen=33
cATR = REPLICATE(CHR(0), nAttribLen)
STORE 0 TO nState, nProtocol
nResult = SCardStatus(hCard, @cReaderNames,;
@nReaderNamesLen, @nState, @nProtocol,;
@cATR, @nAttribLen)
IF (nResult=SCARD_S_SUCCESS)
cReaderName = PADR(m.cReaderNames,;
m.nReaderNamesLen-1)
cATR = PADR(m.cATR, m.nAttribLen)
ENDIF
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| | | My comment: | | | You can call it any time after a successful call to SCardConnect and before a successful call to SCardDisconnect. |
| | | Word Index links for the SCardStatus : | | |
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| | | Translate this page: | | | | | | • | | | Created: | 2008-10-28 15:27:54 | | Modified: | 2008-10-28 15:35:11 |
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