Recordatorio

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ComCtrls, CommCtrl, StdCtrls, Menus,WinSpool, ExtCtrls, 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 declarations }
    started : boolean;
    reg : TRegistry;
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  Dummy : array[0..1024] of byte;
begin
  // Stats started by Button1 hit
  Reg:=TRegistry.Create;
  Reg.RootKey:=HKEY_DYN_DATA;    // Statistic data is saved under this topic
  { Before starting retrieving statistic data you have to query
    the appropiate key under 'PerfStats\StartStat'. }
  Reg.OpenKey('PerfStats\StartStat',false);      // Open this key first to start collecting performance data
  Reg.ReadBinaryData('KERNEL\CPUUsage',Dummy,Sizeof(Dummy));
  Reg.CloseKey;
  started:=true;
end;

procedure TForm1.Timer1Timer(Sender: TObject);
var
  CPUU : integer;
begin
  { After starting the collection of statistic data, you can retrieve the
    recent value under the 'PerfStats\StatData' key. This is done by a timer
    event in this example }
  if started then
  begin
    Reg.OpenKey('PerfStats\StatData',false);      // Open extension kex for txt files
    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
  // Button2 hit stops statistic collection
  { Collecting statistic data is stopped by a query under 'PerfStats/StopStat' }
  Reg.OpenKey('PerfStats\StopStat',false);     // Open this key first to start collecting performance data
  Reg.ReadBinaryData('KERNEL\CPUUsage',Dummy,SizeOf(Dummy));
  Reg.Free;
  Started:=false;
end;

end.

Origen: http://www.delphitips.com/tipstext.cgi?tipsId=108