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type
    IMyInterface = interface(IUnknown)
        ['{06F3EA2C-E9C2-410E-97BE-D88ADF775EC3}']
        procedure InterfaceMethod1;
    end;
    TMyObject = class(TInterfacedObject,IMyInterface)
    private
        FField1: Integer;
        FField2: Boolean;
    protected
        procedure InterfaceMethod1;
    public
        procedure DynamicMethod1; dynamic;
        procedure DynamicMethod2; dynamic;
        procedure VirtualMethod1; virtual;
        procedure VirtualMethod2; virtual;
    end;
    TMyObject2 = class(TMyObject)
    private
        FField3: Integer;
    public
        procedure DynamicMethod1; override;
        procedure VirtualMethod1; override;
    end;
 
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unit Unit1;
interface
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, Grids, DBGrids, DB, ADODB, StdCtrls;
type
  TForm1 = class(TForm)
    Edit1: TEdit;
    Button1: TButton;
    Button ......

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procedure TForm1.Button1Click(Sender: TObject);
var
S: String;
begin
if OpenDialog1.Execute then
begin
s := OpenDialog1.FileName;
WinExec( PChar(s), SW_NORMAL);
end;
end;

----------------------- ......

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2.1.3 Begin…EndÓï¾ä 3
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