如何向应用程序添加到期密钥
问题描述：
大家好
我开发了一种用于自动备份的软件.现在我想将其发送到其他系统.
我想将其作为具有过期密钥的试用版软件(例如互联网使用的试用版软件)提供给
请在发布前告诉我如何限制访问时间...
Hi all
I developed one software for auto-backup.now i want to send it to other system.
i want to give it as a trial software with a expiration key like trial software in internet use to have
Please tell me how to restrict that access time...