Delphi-Help

type

  TForm1 = class(TForm)

    Button1: TButton;

    ProgressBar1: TProgressBar;

    Button2: TButton;

    procedure Button1Click(Sender: TObject);

    procedure Button2Click(Sender: TObject);

  private

    { Private declarations }

  public

    { Public declarations }

  end;

...

const

  PBS_MARQUEE = $08;

  PBM_SETMARQUEE = WM_USER + 10;

...

implementation

...

procedure TForm1.Button1Click(Sender: TObject);

var

  FSpeed: Integer;

begin

   FSpeed := 10;

   SetWindowLong( ProgressBar1.Handle, GWL_STYLE,

                  GetWindowLong( ProgressBar1.Handle, GWL_STYLE ) or

                  PBS_MARQUEE );

   // Включить

   SendMessage( ProgressBar1.Handle, PBM_SETMARQUEE, 1, FSpeed );

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

   // Выключить

   SendMessage( ProgressBar1.Handle, PBM_SETMARQUEE, 0, 0 );

end;