摘要：
一、窗体二、代码窗体代码:unit Unit2;interfaceuses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls,BleepInt;type TForm2 = class(TForm) Button1: TButton; Button2: TButton; Button3: TButton; Button4: TButton; Button5: TButton; Button6: TButton; procedure Button1Click(Se 阅读全文