在Delphi中出现的couldn't compile used unit 'unit2.pas',大家看看哪错了，谢谢
unit Unit2;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls, ComCtrls, XPStyleActnCtrls, ActnList,
ActnMan, DB, ADODB, Buttons;
type
TForm2 = class(TForm)
PageControl1: TPageControl;
T...