用VB+MapX实现的用于PDA和PC机的GPS显示源码（很有参考价值），GPS信号采用NMEA0183协议。-GPS code for PDA&PC by using VB+MapX(valuable),GPS signal using NMEA0183 standard

VB UDP协议接收GPRS DTU数据，并通过DDE传给三维力控-GPRS DTU VB UDP protocol to receive data and control through the DDE to pass three-dimensional force

在IFIX组态软件中,采用VB编写GPRS通讯程序,与支持MODBUS协议的PLC进行数据通讯.-In IFIX configuration software, using VB, GPRS communication procedures, and support of MODBUS protocol PLC data communication.