[NumLock]

Код:

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs;

type
  TMyThread = class(TThread)
  private
    param1: String;
    param2: String;
    param3: String;
    param4: Integer;
    param5: Integer;
    rslt: String;
  protected
    procedure Execute; override;
  public
    constructor Create(aparam1, aparam2, aparam3: String; aparam4,
      aparam5: Integer);
    destructor Destroy; override;
  end;

  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
    MyThread: TMyThread;
    procedure OnThread(Sender: TObject);
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TMyThread }

constructor TMyThread.Create(aparam1, aparam2, aparam3: String; aparam4,
  aparam5: Integer);
begin
  inherited Create(True);
  FreeOnTerminate:=True;
  param1:=aparam1;
  param2:=aparam2;
  param3:=aparam3;
  param4:=aparam4;
  param5:=aparam5;
  Resume;
end;

destructor TMyThread.Destroy;
begin
  windows.Beep(1000, 100);
  inherited Destroy;
end;

procedure TMyThread.Execute;
begin
  Sleep(1000);
  rslt:=param1+param2+param3+IntToStr(param4+param5);
end;

{ TForm1 }

procedure TForm1.FormCreate(Sender: TObject);
begin
  MyThread:=TMyThread.Create('a', 'b', 'c', 1, 2);
  MyThread.OnTerminate:=OnThread;
end;

procedure TForm1.OnThread(Sender: TObject);
begin
  Caption:=MyThread.rslt;
end;

end.