[NumLock]

Код:

unit UnitUtl;

interface

uses
  Windows, Messages; 

type
  TMemoryStatusEx = record
    dwLength: DWORD;
    dwMemoryLoad: DWORD;
    ullTotalPhys: Int64;
    ullAvailPhys: Int64;
    ullTotalPageFile: Int64;
    ullAvailPageFile: Int64;
    ullTotalVirtual: Int64;
    ullAvailVirtual: Int64;
    ullAvailExtendedVirtual: Int64;
  end;

function GlobalMemoryStatusEx(var lpBuffer: TMemoryStatusEx): Boolean; stdcall; external kernel32;

function GlobalMemoryStatusExTotalPhys: Int64;
function GlobalMemoryStatusExAvailPhys: Int64;

implementation

function GlobalMemoryStatusExTotalPhys: Int64;
var
  MemoryStatus: TMemoryStatusEx;
begin
  Result:=-1;
  MemoryStatus.dwLength:=SizeOf(TMemoryStatusEx);
  if GlobalMemoryStatusEx(MemoryStatus) then Result:=MemoryStatus.ullTotalPhys;
end;

function GlobalMemoryStatusExAvailPhys: Int64;
var
  MemoryStatus: TMemoryStatusEx;
begin
  Result:=-1;
  MemoryStatus.dwLength:=SizeOf(TMemoryStatusEx);
  if GlobalMemoryStatusEx(MemoryStatus) then Result:=MemoryStatus.ullAvailPhys;
end;

end.