The SEQUENCE_INFO structure stores the sequence information about the applicable message in a message stream sent from a given sending computer to a given destination queue.

 typedef struct tagSEQUENCE_INFO {
   LONGLONG SeqID;
   ULONG SeqNo;
   ULONG PrevNo;
 } SEQUENCE_INFO;

SeqID: Specifies a sequence identifier.

SeqNo: Specifies the sequence number of a message within the sequence identified by the SeqID member.

PrevNo: Specifies the sequence number of the message previous to the message indicated by the SeqNo member within the sequence identified by the SeqID member.