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procedure TForm1.Button1Click(Sender: TObject);
begin
 Edit1.Text := inttostr ( TCpuMonitor.Create.GetCpuLoadPercent)   ;
end;					

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procedure TForm1.Button1Click(Sender: TObject);
begin
    with TCpuMonitor.Create do
    begin
        Edit1.Text := inttostr ( GetCpuLoadPercent);
    end;
end;					

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  private
    { Private-Deklarationen }
    cpm:TCPUMonitor;
....
procedure TForm1.FormCreate(Sender: TObject);
begin
  cpm:= TCpuMonitor.Create;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  Label1.Caption := inttostr(cpm.GetCpuLoadPercent);
end;

procedure TForm1.FormDestroy(Sender: TObject);
begin
  cpm.Free;
end;