Оформил: DeeCo
Автор: http://www.swissdelphicenter.ch

// Works only on Windows NT systems (WinNT, Win2000, WinXP) 

// Funktioniert nur unter Windows NT Systemen (WinNT, Win2000, WinXP) 

uses psAPI;

 procedure TForm1.Button1Click(Sender: TObject);
 var
   pmc: PPROCESS_MEMORY_COUNTERS;
   cb: Integer;
 begin
   cb := SizeOf(_PROCESS_MEMORY_COUNTERS);
   GetMem(pmc, cb);
   pmc^.cb := cb;
   if GetProcessMemoryInfo(GetCurrentProcess(), pmc, cb) then
     Label1.Caption := IntToStr(pmc^.WorkingSetSize) + ' Bytes'
   else
     Label1.Caption := 'Unable to retrieve memory usage structure';

   FreeMem(pmc);
 end;