SCARD_IO_REQUEST structure

The SCARD_IO_REQUEST structure begins a protocol control information structure. Any protocol-specific information then immediately follows this structure. The entire length of the structure must be aligned with the underlying hardware architecture word size. For example, in Win32 the length of any PCI information must be a multiple of four bytes so that it aligns on a 32-bit boundary.

Syntax

typedef struct {
  DWORD dwProtocol;
  DWORD cbPciLength;
} SCARD_IO_REQUEST;

Members

dwProtocol

Protocol in use.

cbPciLength

Length, in bytes, of the SCARD_IO_REQUEST structure plus any following PCI-specific information.

Requirements

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	Winsmcrd.h

See also

SCardTransmit