unit Unit1;

interface

uses

  Winapi.Windows, Winapi.Messages, System.SysUtils,System.StrUtils, System.Variants, System.Classes, Vcl.Graphics,

  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Vcl.ExtCtrls;

type

  TForm1 = class(TForm)

    Label1: TLabel;

    Timer1: TTimer;

    procedure FormCreate(Sender: TObject);

    procedure Timer1Timer(Sender: TObject);

  private

    { Private declarations }

    Times: TThread.TSystemTimes;

  public

    { Public declarations }

  end;

var

  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);

begin

TThread.GetSystemTimes(Times);

  end;

procedure TForm1.Timer1Timer(Sender: TObject);

var

  Usage: Integer;

begin

  Usage := TThread.GetCPUUsage(Times);

  form1.Caption := IntToStr(Usage) + '%';

end;

end.

演示图