_FAST_IO_SECTION

struct _FAST_IO_SECTION{
    volatile FAST_IO_SECTION_HEADER fast_io_header;
    INTERMEDIATE_BUFFER fast_io_packets[ANY_SIZE]; 
};

Defines the structure of the shared memory section:

fast_io_header
Shared memory header containing information about number of the packets in the section and operations in progress.

fast_io_packets
Array of INTERMEDIATE_BUFFER structures

Available starting version 3.2.20. Fast I/O is supported for Windows Vista and later. WOW64 mode is not supported.