1 unit Unit1;
 2 
 3 interface
 4 
 5 uses
 6   Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
 7   Dialogs, StdCtrls;
 8 
 9 type
10   TForm1 = class(TForm)
11     Button1: TButton;
12     procedure Button1Click(Sender: TObject);
13   private
14     { Private declarations }
15   public
16     { Public declarations }
17   end;
18 
19 var
20   Form1: TForm1;
21 
22 implementation
23 
24 {$R *.dfm}
25 
26 procedure TForm1.Button1Click(Sender: TObject);
27 var
28   int1: Integer;
29 begin
30   try
31     int1 := StrToInt('A');
32   except
33     ShowMessage(Exception(ExceptObject).Message);
34   end;
35 end;
36 
37 end.