(Delphi ActiveX) Send Bytes on a Socket Connection

Demonstrates how to send a mixture of binary (non-text) and text bytes on a socket connection.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
socket: TChilkatSocket;
ssl: Integer;
maxWaitMillisec: Integer;
port: Integer;
success: Integer;
bd: TChilkatBinData;

begin
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

socket := TChilkatSocket.Create(Self);

// Connect to some host:port
ssl := 0;
maxWaitMillisec := 20000;
port := 5555;
success := socket.Connect('test.com',port,ssl,maxWaitMillisec);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;

// We wish to send a 0x00 byte followed by the us-ascii string "10800"
bd := TChilkatBinData.Create(Self);

bd.AppendByte(0);
bd.AppendString('10800','utf-8');

// Send the entire contents of bd.
success := socket.SendBd(bd.ControlInterface,0,0);
if (success <> 1) then
  begin
    Memo1.Lines.Add(socket.LastErrorText);
    Exit;
  end;
end;