本例中TRegistry是关键类，Delphi 4.0不能自行加入，需在uses部分手工加入registry，通过其方法ReadString和WriteString来读出和写入字符，亦可通过其方法“ReadDate”和“WriteDate”来读出和写入日期。 -The this example TRegistry key class, Delphi 4.0 not self-join, to be added manually in the uses part REGISTRY ReadString and WriteString through its approach to read out and write characters, but also by its method " ReadDate"　and " writeDate read and write date.