[NumLock]

Код:

interface

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

type
  TTumanThread = class(TThread)
  private
    procedure UpdateVCL;
  protected
    procedure Execute; override;
  end;

  TForm1 = class(TForm)
    Label1: TLabel;
    procedure FormCreate(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

{ TTumanThread }

procedure TTumanThread.Execute;
begin
  Synchronize(UpdateVCL);
end;

procedure TTumanThread.UpdateVCL;
begin
  Form1.Label1.Caption:='TTumanThread';
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
  TTumanThread.Create(False);
end;

end.