sp_MSanonymous_status (Transact-SQL MetaData) Definition

Please note: that the following source code is provided and copyrighted by Microsoft and is for educational purpose only.
The meta data is from an SQL 2012 Server.

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Definition:

sys.sp_MSanonymous_status(int @agent_id
, int @no_init_sync
, varbinary @last_xact_seqno)

MetaData:

 CREATE PROCEDURE sys.sp_MSanonymous_status  
(  
    @agent_id           int,  
    @no_init_sync       int = 0,  
    @last_xact_seqno varbinary(16)  
)  
as  
begin  
   set nocount on  
  
   declare @virtual_agent_id int    --  virtual sub agent id  --   
   declare @anonymous_agent_id int  --  virtual anonymous agent id  --   
  
    --  Note @agent_id will be overwritten later.  
    select  @virtual_agent_id =   virtual_agent_id,  
            @anonymous_agent_id = anonymous_agent_id  
        from MSdistribution_agents where  
            id = @agent_id  
      
    --  Return error if agent entry does not exists (being deleted).  
    if @virtual_agent_id is null  
    begin  
        raiserror(21072, 16, -1)  
        return(1)  
    end  
  
    --  If no init sync, use anonymous account to start immediately.  
    --  If first time, or still working on the first snapshot, or just finished  
    --  the first snapshot, use virtual account. This is to cover the case  
    --  of multiple snapshot transactions (for example, one per article) in the first  
    --  snapshot.  
    --  otherwise use virtual anonymous account  
    if  @no_init_sync = 1   
        select @agent_id = @anonymous_agent_id  
    else if @last_xact_seqno = 0x00   
        select @agent_id = @virtual_agent_id  
    else  
        select @agent_id = @anonymous_agent_id  
      
    --   
    --  Call main procedure for to get status  
    --  PAL security check is done in the main proc  
    --   
    exec sys.sp_MSsubscription_status  
        @agent_id = @agent_id  
end