Code:

procedure TForm1.Button1Click(Sender: TObject);

{©Drkb v.3(2007): www.drkb.ru,

®Vit (Vitaly Nevzorov) - nevzorov@yahoo.com}

var t:TFileStream;

begin

t:=TFileStream.create('c:\myfilename.txt', fmCreate or fmOpenWrite);

t.Size:=0;

RxRichEdit1.Lines.SaveToStream(t);

t.free;

end;