IS/AS 示例代码

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    edt1: TEdit;
    btn1: TButton;
    procedure FormCreate(Sender: TObject);
  private
    procedure MyPro(Sender: TObject);
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
edt1.OnClick :=MyPro;
btn1 .OnClick :=MyPro;
end;
procedure Tform1.MyPro(Sender: TObject);
begin
  if Sender is TEdit then
  ShowMessage((Sender as TEdit).Text  );
  if Sender is TButton then
  ShowMessage((Sender as TButton).Caption  );
end;
end.