如何用delphi来实现对cpu和内存利用率的读取。

Question

读取cpu的利用率:
unit Unit1;interfaceuses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ComCtrls, CommCtrl, StdCtrls, Menus,WinSpool, ExtCtrls, Validat, Buttons,
  Registry;type
  TForm1 = class(TForm)
    Button1: TButton;
    Label1: TLabel;
    Label2: TLabel;
    Timer1: TTimer;
    Button2: TButton;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Timer1Timer(Sender: TObject);
  private
    { Private-Deklarationen }
    started : boolean;
    reg : TRegistry;
  public
    { Public-Deklarationen }
  end;var
  Form1: TForm1;implementation{$R *.DFM}procedure TForm1.Button1Click(Sender: TObject);
  var
  Dummy : array[0..1024] of byte;begin
  Reg:=TRegistry.Create;
  Reg.RootKey:=HKEY_DYN_DATA;     //统计数据在这个表项下
  Reg.OpenKey('PerfStats\StartStat',false);       //   Reg.ReadBinaryData('KERNEL\CPUUsage',Dummy,Sizeof(Dummy));
  Reg.CloseKey;
  started:=true;
end;procedure TForm1.Timer1Timer(Sender: TObject);
  var
  CPUU : integer;begin
  if started then
  begin
    Reg.OpenKey('PerfStats\StatData',false);       
    Reg.ReadBinaryData('KERNEL\CPUUsage',CPUU,SizeOf(Integer));
    Reg.CloseKey;
    Label1.Caption:=IntToStr(CPUU)+'%';
  end;
end;procedure TForm1.Button2Click(Sender: TObject);
  var
  Dummy : array[0..1024] of byte;begin
'PerfStats/StopStat' }
  Reg.OpenKey('PerfStats\StopStat',false);      
  Reg.ReadBinaryData('KERNEL\CPUUsage',Dummy,SizeOf(Dummy));
  Reg.Free;
  Started:=false;
end;end.