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 are dongle and registration methods.