Sender和Tag的用法 在它们共同的OnClick事件下返回单击的那个按钮的标题
unit Unit1;
interface
uses
Winapi.Windows, Winapi.Messages,
System.SysUtils, System.Variants, System.Classes,
Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs,
Vcl.StdCtrls;
type
TForm1 = class(TForm)
Button1:
TButton;
Button2:
TButton;
Button3:
TButton;
Button4:
TButton;
Button5:
TButton;
Button6:
TButton;
Button7:
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 Sender is
TButton then
ShowMessage((Sender
as TButton).Caption);
end;