hello!I'm creating ipv6-based video conference application on Vista.I make a Vista host join multicast group by following code.struct group_source_req gsr;.....set ifindex, source address and group address....setsockopt(sd, IPPROTO_IPV6, MCAST_JOIN_SOURCE_GROUP, char*)&gsr, sizeof gsr);And I confirm packet capture,MLDv2 Multicast Listener Report is sent by the host when it joins a multicast group.but is not sent when it receive an MLDv2 Multicast Listener Query sent by a router.Other Linux host send MLDv2 Multicast Listener Report when it receive an MLDv2 Multicast Listener Query sent by a router.I want to make Vista response to the Query like Linux.Can I do it?Thanks!