The base component of ICS. All other components use it. It can be used for own based protocols other than the one provided with ICS. It ecaptulates TCP and UDP and can be used als a client or a server. SOCKS support and Multicast is also provided.

Here are the sections available for the TWSocket:

• [ Properties ]
  
• [ Events ]
  
• [ Methods ]
  
• [ Globals ]
  
• [ Notes ]
  

Below is the full description for all the sections in the TWSocket:

[Properties]

Below is a list of all Properties for use as a quick reference:

• Addr
  
• ComponentOptions
  
• DnsResult
  
• DnsResultList
  
• FlushTimeOut
  
• LastError
  
• LineEcho
  
• LineEdit
  
• LineEnd
  
• LineLimit
  
• LineMode
  
• LingerOnOff
  
• LingerTimeout
  
• LocalAddr
  
• LocalPort
  
• MultiThreaded
  
• MultiCast
  
• MultiCastAddrStr
  
• MultiCastIpTTL
  
• ReuseAddr
  
• PeerAddr
  
• PeerPort
  
• Port
  
• Proto
  
• RcvdCount
  
• ReadCount
  
• SendFlags
  
• SocksAuthentication
  
• SocksLevel
  
• SocksPassword
  
• SocksPort
  
• SocksServer
  
• SocksUsercode
  
• Terminated
  

Below is a list of all Properties with their complete descriptions:

[Events]

Below is a list of all Events for use as a quick reference:

• OnBgException
  
• OnChangeState
  
• OnDataAvailable
  
• OnDataSent
  
• OnDnsLookupDone
  
• OnError
  
• OnLineLimitExceeded
  
• OnLineTooLong
  
• OnMessagePump
  
• OnSendData
  
• OnSessionAvailable
  
• OnSessionClosed
  
• OnSessionConnected
  
• OnSocksAuthState
  
• OnSocksConnected
  
• OnSocksError
  

Below is a list of all Events with their complete descriptions:

procedure TForm1.WSocket1BgException(Sender: TObject; E: Exception;
  var CanClose: Boolean);
begin
   CanClose := True; // let's close the connection
end;

procedure TForm1.WSocket1ChangeState(Sender: TObject; OldState,
  NewState: TSocketState);
const
   aSocketState: array[TSocketState] of string = (
     'Invalid',   'Opened',
      'Bound',     'Connecting',
      'Connected', 'Accepting',
      'Listening', 'Closed');
begin
   if not Application.Terminated then
      Label1.Caption := aSocketState[NewState];
end;

procedure TForm1.WSocket1DataAvailable(Sender: TObject; Error: Word);
var
   Count: integer;
   Rcvd: array[0..8191] of char;
begin
   if Error <> 0 then
      Exit;

   with Sender as TWSocket do
      Count := Receive(@Rcvd[0], High(Rcvd));

   if Count <= 0 then
      Exit;

   // Here handle the received data
end;

procedure TForm1.WSocket1DataSent(Sender: TObject; Error: Word);
begin
   if Error <> 0 then
      Exit;

   PostMessage(Handle, WM_NEXT_DATA, integer(Sender), 0);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
   with WSocket1 do
      DnsLookup('ftp.microsoft.com');
end;

procedure TForm1.WSocket1DnsLookupDone(Sender: TObject; Error: Word);
begin
   if Error <> 0 then
      Exit;

   with Sender as TWSocket do begin
      Addr := DnsResult;
      Port := 'ftp';
      Connect;
   end;
end;

procedure TForm1.WSocket1LineLimitExceeded(Sender: TObject;
  RcvdLength: Integer; var ClearData: Boolean);
begin
   with Sender as TWSocket do
      CloseDelayed;  // just trow this client away
end;

[Methods]

Below is a list of all Methods for use as a quick reference:

• Importand
  
• Abort
  
• Close
  
• CloseDelayed
  
• Connect
  
• Release
  
• Flush
  
• WaitForClose
  
• Listen
  
• Accept
  
• Receive
  
• ReceiveStr
  
• ReceiveFrom
  
• PeekData
  
• Send
  
• SendTo
  
• SendStr
  
• DnsLookup
  
• ReverseDnsLookup
  
• CancelDnsLookup
  
• GetPeerAddr
  
• GetPeerPort
  
• GetPeerName
  
• GetXPort
  
• GetXAddr
  
• TimerIsSet
  
• TimerClear
  
• TimerCmp
  
• GetSockName
  
• SetLingerOption
  
• Dup
  
• Shutdown
  
• Pause
  
• ReadLine
  
• Resume
  
• PutDataInSendBuffer
  
• PutStringInSendBuffer
  
• DeleteBufferedData
  
• MessagePump
  
• MessageLoop
  
• ProcessMessage
  
• ProcessMessages
  
• ThreadAttach
  

Below is a list of all Methods with their complete descriptions:

[Globals]

Below is a list of all Globals for use as a quick reference:

• WinsockInfo
  
• WSocketErrorDesc
  
• WSocketGetHostByAddr
  
• WSocketGetHostByName
  
• LocalHostName
  
• LocalIPList
  
• WSocketResolveIp
  
• WSocketResolveHost
  
• WSocketResolvePort
  
• WSocketResolveProto
  
• WSocketForceLoadWinsock
  
• WSocketCancelForceLoadWinsock
  
• WSocketUnloadWinsock
  
• WSocketIsDottedIP
  

Below is a list of all Globals with their complete descriptions: