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unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    procedure FormShow(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormShow(Sender: TObject);
begin
  shellexecute(application.Handle,
               'open',
               rundll32.exe powrprof.dll,SetSuspendState Hibernate',
               nil,
               nil,
               SW_SHOW);
  // shellexecute(rundll32.exe powrprof.dll,SetSuspendState Hibernate); //Orig!
  ////Erweiterung
  // Benutzer abmelden
  // ExitWindowsEx (EWX_LOGOFF, $FFFFFFFF);

  exit;
end;                    

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function TMainForm.SetSuspendState(Hibernate, ForceCritical,DisableWakeEvent: Boolean): Boolean;

  function LinkAPI(const module, functionname: string): Pointer;
  var
    hLib: HMODULE;
  begin
    hLib := GetModulehandle(PChar(module));
    if hLib = 0 then
       hLib := LoadLibrary(PChar(module));
    if hLib <> 0 then
       Result := getProcAddress(hLib, PChar(functionname))
    else
       Result := nil;
end;

begin
  if not Assigned(_SetSuspendState) then
    @_SetSuspendState := LinkAPI('POWRPROF.dll', 'SetSuspendState');
  if Assigned(_SetSuspendState) then
    Result := _SetSuspendState(Hibernate, ForceCritical,
      DisableWakeEvent)
  else
    Result := False;
end;                    

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function TMainForm.ExWindows(const AFlag: Word): Boolean;
var
  vi     : TOSVersionInfo;
  hToken : THandle;
  tp     : TTokenPrivileges;
  h      : DWord;
begin
  result:= false;

  vi.dwOSVersionInfoSize:=SizeOf(vi);

  if GetVersionEx(vi) then
  begin
    if vi.dwPlatformId = VER_PLATFORM_WIN32_NT then
    begin
      // Windows NT
      if OpenProcessToken(GetCurrentProcess,TOKEN_ADJUST_PRIVILEGES,hToken) then
      begin
        LookupPrivilegeValue(nil,'SeShutdownPrivilege',tp.Privileges[0].Luid);
        tp.PrivilegeCount := 1;
        tp.Privileges[0].Attributes := SE_PRIVILEGE_ENABLED;
        h := 0;
        AdjustTokenPrivileges(hToken,False,tp,0,PTokenPrivileges(nil)^, h);
        CloseHandle(hToken);
        result := ExitWindowsEx(Aflag, 0);
      end;
    end
    else
    begin // Windows 95
      Result := ExitWindowsEx(Aflag, 0);
    end;
  end;
end;

...

        ShutDown: ExWindows(EWX_Poweroff or EWX_FORCEIFHUNG);
        Restart : ExWindows(EWX_Reboot or EWX_FORCEIFHUNG);
        LogOut  : ExWindows(EWX_Logoff or EWX_FORCEIFHUNG);