[MSDN Library June 1998] SIO_MULTICAST_SCOPE ioctl (91.8571428571429%)

MSDN Library Visual Studio 6.0 > Platform SDK > Networking and Distributed Services > Windows Sockets Version 2 > Windows Sockets Version 2 SPI > Overviews > Windows Sockets 2 Transport Provider Requirements > SPI: Protocol-Independent Multicast and Multipoint