SmsControl控件经过严格设计，其特点为： 1、调用简单，仅3个函数调用，2个事件消息，简化了客户端的设计。2、收发可靠，所有消息极力发送，发送失败的消息会在两天内持续发送，发送成功失败事件通知客户端；在Modem出现硬件故障不能启动的情况下照常接收发送任务，Modem启动后开始实际的发送，在出现硬件或操作系统故障的情况下保证消息的不丢失。3、可以支持广泛的移动短消息收发设备。4、随着移动短消息收发设备状态的变化SmsControl控件自动调整其收发参数。 -SmsControl strict design controls, its features are: 1, call is simple, only three function calls, two event messages, simplifying the design of the client. 2, send and receive reliable, tried all messages sent, send failure message will be sent within two days continuously, send success or failure event notification client　in the Modem hardware failure can not start sending the case to receive usual tasks, Modem after the actual start send, in the event of hardware or operating system failures do not guarantee the message is lost. 3, can support a wide range of mobile short messaging device. 4, mobile short messaging device with the changes in the status SmsControl control automatically adjusts its send and receive parameters.