unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    btnOK: TButton;
    RadioButton1: TRadioButton;
    RadioButton2: TRadioButton;
    RadioButton3: TRadioButton;
    procedure FormCreate(Sender: TObject);
    procedure btnOKClick(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
var
  hToken : THandle;
  Tkp : TTokenPrivileges;
  Zero:DWORD;
begin
  OpenProcessToken(GetCurrentProcess(),TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY,hToken);
  LookupPrivilegeValue(nil,'SeShutdownPrivilege',tkp.Privileges[0].Luid);
  Tkp.PrivilegeCount :=1;
  Tkp.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
  AdjustTokenPrivileges(hToken,False,Tkp,SizeOf(TTokenPrivileges),nil,Zero);
end;

procedure TForm1.btnOKClick(Sender: TObject);
begin
    if self.RadioButton1.Checked then
    begin
        ExitWindowsEx(EWX_LOGOFF,0);
    end;
    if self.RadioButton2.Checked then
    begin
        ExitWindowsEx(EWX_REBOOT,0);
    end;
    if self.RadioButton3.Checked then
    begin
        ExitWindowsEx(EWX_SHUTDOWN or EWX_POWEROFF,0);
    end;
end;

end.