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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.
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