Example Source of Reliable TCP Packets with Headers and Data, OOP.

Greetings,

I need some good example code that deals with TCP packets where there is a known header with data length as part of the header (including header) and data.

Would like it to be asyncronous if possible.  I need to be able to send data from a memo line and stuff.  Perhaps an OnPacket event or something that gets called where there is a full packet available.

Anyway, this is what I am working with.

(BYTE)      StartPacket - always 0xFF
(BYTE)      Packet ID
(WORD)    Packet length, including this header
(VOID)      Packet Data

I did get something sort of working with using Indy Client, but it gets stuck in between packets and I can't send anything.  Also I find it crashes with errors when you close the program while it is waiting for data to read and stuff.

I would love for it to be OOP (object oriented programming).  Meaning making a object that is based off of TObject and has an event of OnPacket or something that is called when it gets a full packets with all the data and stuff and passes the data along to the event.

OnPacket(PacketID, Length, data)


Anyway, here is some source I got so far that I want to scratch and use some asycronious method...  I'd really not like to have to deal with threads is if I don't have to.

      while BNET.Connected do
      begin
        try
          BNET.ReadBuffer(StartPacket,1);
          BNET.ReadBuffer(PacketID,1);
          BNET.ReadBuffer(AByte,1);
          BNET.ReadBuffer(PacketLength,1);
          PacketLength := (PacketLength SHL 8) + AByte;
          BNET.ReadBuffer(PacketData,PacketLength-4);
        except
          on E: Exception do
            begin
              OutPutBox.Lines.Add('Error: '+E.Message);
              BNET.Disconnect
            end;
        end;
        Case StartPacket of
          $FF :
            Case PacketID of
              SID_CLANINVITE : OutPutBox.Lines.Add('  SID_CLANINVITE');
              //...
              SID_CLANMOTD : OutPutBox.Lines.Add('  SID_CLANMOTD');
          Else
            Begin
            End;
        End;
        If Terminated then BNET.Disconnect;
      end;

PS - I'd love to be able to give more than 500 points for this too, but it won't let me.  :)