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This code is used to issue various power operations on a smart card.
Parameters
- dwOpenData
[in] Handle returned from a call to the smart card reader driver's XXX_Open (Device Manager) function. - dwCode
[in] Specifies this code. - pBufIn
[in] Contains one of the following codes to select a specific power operation.Code Operation SCARD_COLD_RESET Power down the smart card and power it up again. SCARD_WARM_RESET Reset the smart card without removing power. SCARD_POWER_DOWN Remove power from the smart card. - dwLenIn
Ignored. - pBufOut
[out] Used with SCARD_COLD_RESET and SCARD_WARM_RESET to store a complete ATR from the smart card. - dwLenOut
[out] The size of the output buffer. This must be at least 33 bytes to hold a complete ATR. - pdwActualOut
[out] The actual number of bytes in the ATR.
Return Values
One of the following status values.
| Status | Description |
|---|---|
| STATUS_SUCCESS | The operation completed successfully. |
| STATUS_UNRECOGNIZED_MEDIA | The smart card is unsupported or unknown. |
| STATUS_NO_MEDIA | There is no smart card in the card reader. |
| STATUS_IO_TIMEOUT | The operation has timed out. |
Remarks
Smart card reader drivers return Windows NT status values, rather than Win32 error values, as the return values from the driver's callback function.
Requirements
OS Versions: Windows CE 3.0 and later.
Header: Winsmcrd.h.
See Also
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