一个实用的短信开发控件，对于所有的Modem均可用。对于二次开发人员来说非常有帮助，可以大大减少开发时间，里面有加密狗和注册方式。-Development of a practical control message, for all the Modem can be used. For the secondary development of staff is very helpful, you can significantly reduce development time, there