Как перевести компьютер в Stend by или Hibernate?

{
  The SetSuspendState function suspends the system by shutting power down.
  Depending on the Hibernate parameter,
  the system either enters a suspend (sleep) state or hibernation.
 
  Syntax:
}
 
 function SetSuspendState(
   Hibernate: Boolean,
   ForceCritical: Boolean,
   DisableWakeEvent: Boolean);
 
 
{  Parameters:
 
   Hibernate: If this parameter is TRUE, the system hibernates.
              If the parameter is FALSE, the system is suspended.
   ForceCritical: If this parameter is TRUE, the system suspends operation immediately;
                  if it is FALSE, the system broadcasts a PBT_APMQUERYSUSPEND event to
                  each application to request permission to suspend operation.
   DisableWakeEvent: If this parameter is TRUE, the system disables all wake events.
                     If the parameter is FALSE, any system wake events remain enabled.
 
 
  Windows NT/2000/XP: Included in Windows 2000 and later.
  Windows 95/98/Me: Included in Windows 98 and later.
}
 
var
  _SetSuspendState: function (Hibernate, ForceCritical, DisableWakeEvent: BOOL): BOOL
  stdcall = nil;
 
  function LinkAPI(const module, functionname: string): Pointer; forward;
 
function SetSuspendState(Hibernate, ForceCritical,
  DisableWakeEvent: Boolean): Boolean;
begin
  if not Assigned(_SetSuspendState) then
    @_SetSuspendState := LinkAPI('POWRPROF.dll', 'SetSuspendState');
  if Assigned(_SetSuspendState) then
    Result := _SetSuspendState(Hibernate, ForceCritical,
      DisableWakeEvent)
  else
    Result := False;
end;
 
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;
 
// Example Call:
// Beispielaufruf:
 
procedure TForm1.Button1Click(Sender: TObject);
begin
  SetSuspendState(True, False, False);
end;

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php

procedure TForm1.Button1Click(Sender: TObject);
 begin
   SendMessage(Handle, WM_SYSCOMMAND, SC_SCREENSAVE, 1);
 end

Взято с сайта: https://www.swissdelphicenter.ch