who does know Delphi language? There is a example code about scrolling window capture. somebody can convert it to au3? --------------------------------------------------------- unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ComCtrls; const TAGCOLOR : TColor = $00FEFEFE; type TForm1 = class(TForm) Memo1: TMemo; RichEdit1: TRichEdit; Button1: TButton; RadioButton1: TRadioButto