The key to successfully designing a validation control is to give users generous feedback. An entry control that merely refuses to accept input is just plain rude and will guarantee an angry and resentful user.

• 成功设计确认控件的关键是为用户提供充分的反馈，一个只是拒绝的输入控件很粗鲁，它肯定会让用户感到气愤和愤慨。