Desligando e reiniciando o windows

{Nesta dica veremos como desligar e reiniciar o Windows. Os passos necessários para implementá-lo são os seguintes:

1) Inclua no seu formulário dois componentes do tipo Button;

2) Escreva o código a seguir, de forma que a sua Unit se pareça com o texto abaixo:}

unit Unit1;

interface

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

type
TForm1 = class(TForm)
Button1: TButton;
Button2: TButton;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
Function DesligarMeuWindows(RebootParam: Longword): Boolean;
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

{ TForm1 }

function TForm1.DesligarMeuWindows(RebootParam: Longword): Boolean;
var
TTokenHd: THandle;
TTokenPvg: TTokenPrivileges;
cbtpPrevious: DWORD;
rTTokenPvg: TTokenPrivileges;
pcbtpPreviousRequired: DWORD;
tpResult: Boolean;
const
SE_SHUTDOWN_NAME = 'SeShutdownPrivilege';
begin
if Win32Platform = VER_PLATFORM_WIN32_NT then
begin
tpResult := OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES or TOKEN_QUERY,
TTokenHd);
if tpResult then
begin
tpResult := LookupPrivilegeValue(nil, SE_SHUTDOWN_NAME, TTokenPvg.Privileges[0].Luid);
TTokenPvg.PrivilegeCount := 1;
TTokenPvg.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
cbtpPrevious := SizeOf(rTTokenPvg);
pcbtpPreviousRequired := 0;
if tpResult then
Windows.AdjustTokenPrivileges(TTokenHd, False, TTokenPvg, cbtpPrevious, rTTokenPvg, pcbtpPreviousRequired);
end;
end;
Result := ExitWindowsEx(RebootParam, 0);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
DesligarMeuWindows(EWX_POWEROFF or EWX_FORCE);
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
DesligarMeuWindows(EWX_REBOOT or EWX_FORCE);
end;

end.