[NumLock]

Код:

procedure TForm1.Button1Click(Sender: TObject);
var
  MemoryStatus: TMemoryStatus;
begin
  Memo1.Lines.Clear;
  MemoryStatus.dwLength := SizeOf(MemoryStatus) ;
  GlobalMemoryStatus(MemoryStatus) ;
  with MemoryStatus do begin
    Memo1.Lines.Add(IntToStr(dwLength) +
      ' Size of ''MemoryStatus'' record') ;
    Memo1.Lines.Add(IntToStr(dwMemoryLoad) +
      '% memory in use') ;
    Memo1.Lines.Add(IntToStr(dwTotalPhys) +
      ' Total Physical Memory in bytes') ;
    Memo1.Lines.Add(IntToStr(dwAvailPhys) +
      ' Available Physical Memory in bytes') ;
    Memo1.Lines.Add(IntToStr(dwTotalPageFile) +
      ' Total Bytes of Paging File') ;
    Memo1.Lines.Add(IntToStr(dwAvailPageFile) +
      ' Available bytes in paging file') ;
    Memo1.Lines.Add(IntToStr(dwTotalVirtual) +
      ' User Bytes of Address space') ;
    Memo1.Lines.Add(IntToStr(dwAvailVirtual) +
      ' Available User bytes of address space') ;
   end;
end;