This packet is designed to deliver a Secondary clients "Browse" request to its primary host, The third party subject of the "Browse" request is selected by the initiating Secondary client.

This is the packet format

[0x1B59][ Packet Data Length : 2 ][ "WinMX " : 6 ][ User IP & Port  ASCII : 12 ][ 00 :1 ][ UserName : S ][ 00 : 1 ]


Typical browse sequence.
* Browsing Request ( 0x1B59 - Secondary to Primary) -> Browse Entry ( 0x1BBC - Primary to Secondary ) ->Browse Completed ( 0x1BC6 - Primary to Secondary ) -> Browsing End Notification ( 0x1B5A - Secondary to Primary)