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data := (PChar('c:winnt
otepad.exe'));
ShellExecute(Application.Handle, 'open', data, nil, nil, SW_SHOW);                    

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unit MIUnit;                  
interface
uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, Buttons, Oracle, ShellAPI;
type
  TForm1 = class(TForm)
    pbExit: TBitBtn;
    Button1: TButton;
    Memo1: TMemo;
    procedure FormActivate(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure pbExitClick(Sender: TObject);
  private
    { Private-Deklarationen }
  public
  end;
var
  Form1: TForm1;
implementation
{$R *.DFM}
procedure TForm1.pbExitClick(Sender: TObject);
begin
   Close;
end;
procedure TForm1.FormActivate(Sender: TObject);
begin
   //sDatei := Paramstr(1);
end;
procedure TForm1.Button1Click(Sender: TObject);
var data:pchar;
begin

   data := (PChar('c:\winnt\notepad.exe'));
   ShellExecute(Application.Handle, 'open', data, nil, nil, SW_SHOW);

end;
end.                    

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ShellExecute(self.Handle,'open','notepad.exe',nil,nil,SW_SHOW);