unit1.pas

这是《Delphi程序设计基础》由李文池写的书的示例代码

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
begin
  if Label1.Visible then   
  begin
     Label1.Visible:=False;  //如果是显示的，则隐藏
	 Button1.Caption:='显示';
  end
  else
  begin
     Label1.Visible:=True;  //如果是隐藏的，则显示
	 Button1.Caption:='隐藏';
  end;
end;


end.