关于Delphi大Bug的更详细的例子

下面是一个关于Delphi大Bug的更加详尽的例子。

我建议大家尽可以好好去试试。关于它的讨论，希望热烈一点，借此，

能对大家多少有些帮助。两外两个类似的文章在

http://www.csdn.net/develop/read_article.asp?id=12606

http://www.csdn.net/develop/read_article.asp?id=12525

下面是例子源代码，其中的设置，您尽可以自由发挥。

unit Unit1;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls, Menus, ExtCtrls, jpeg;

type

TForm1 = class(TForm)

Button1: TButton;

MainMenu1: TMainMenu;

xiangya1: TMenuItem;

Image1: TImage;

Shape1: TShape;

procedure Button1Click(Sender: TObject);

procedure xiangya1Click(Sender: TObject);

procedure Image1Click(Sender: TObject);

procedure Shape1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

private

{ Private declarations }

public

{ Public declarations }

end;

var

Form1: TForm1;

type

TxObject = class

destructor Destroy;override;

end;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);

var

x: TxObject;

begin

x := TxObject.Create;

ShowMessage('xiangya');

x.Free;

end;

{ TxObject }

destructor TxObject.Destroy;

begin

MessageBox(0, PChar('TxObject'),'Free',MB_OK);

inherited;

end;

procedure TForm1.xiangya1Click(Sender: TObject);

var

x: TxObject;

begin

x := TxObject.Create;

ShowMessage('xiangya');

x.Free;

end;

procedure TForm1.Image1Click(Sender: TObject);

var

x: TxObject;

begin

// x := TxObject.Create;

// ShowMessage('xiangya');

x.Free;

end;

procedure TForm1.Shape1MouseDown(Sender: TObject; Button: TMouseButton;

Shift: TShiftState; X, Y: Integer);

var

xx: TxObject;

begin

// xx := TxObject.Create;

ShowMessage('xiangya');

xx.Free;

end;

end.