倒,这么简单也要问,下面的程序可以给你一个小提示:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.Button1Click(Sender: TObject);
begin
if button1.Caption='1' then
button1.Caption:='0' else
if button1.Caption='0' then
button1.Caption:='1';
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
button1.Caption:='0';
end;
end.