VC6.0++下开发的基于GPRS模块的短信收发和电话拨打软件源码。对GPRS开发具有很好参考意义。-VC6.0++ Developed based on GPRS transceiver modules SMS and phone call software source code. Development of GPRS are very good reference value.

VB版的上位机程序，控制SIM900A软件发送短信。-VB version of the PC program, control SIM900A software to send SMS messages.