vb.net2005/2008实现简单的通过gsm mode来收发短信，并可直接输入at命令进行调试！-vb.net2005/2008 through simple gsm mode to send and receive text messages, and direct input at the command to debug!

vb.net2005 串口通信，实现自动收发的功能， 利用了线程托管，更有优势-Vb. Net2005 serial communication, realizing the function of automatic transceiver, use the thread custody, more advantage