| Platform SDK: Quality of Service | 
The QOS object QOS_OBJECT_DESTADDR is used during a call to the WSAIoctl(SIO_SET_QOS) function in order to avoid issuing a connect function call for a sending socket.
typedef struct _QOS_DESTADDR {
  QOS_OBJECT_HDR           ObjectHdr;   
  const struct sockaddr *  SocketAddress;
  ULONG                    SocketAddressLength; 
} QOS_DESTADDR, *LPQOS_DESTADDR;
  Windows NT/2000: Requires Windows 2000.
  Windows 95/98: Unsupported.
  Header: Declared in Qossp.h.