unit test; interface uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,bitmapprogress, StdCtrls; type TForm1 = class(TForm) Button1: TButton; procedure Button1Click(Sender: TObject); private { Private declarations } public { Public declarations } end; var Form1: TForm1; a : tbitmapprogress; implementation {$R *.DFM} procedure TForm1.Button1Click(Sender: TObject); var bmp : tbitmap; n : integer; begin a:=tbitmapprogress.create(form1); bmp:=tbitmap.Create; bmp.loadfromfile('cd.bmp'); a.top:=100; a.left:=100; a.width:=200; a.height:=200; a.assignbackground(bmp); a.paint; a.max:=150; a.radius:=100; a.startradius:=36; for n:=0 to 15000 do begin a.position:=n; end; bmp.free; a.position:=0; end; end.