Simple demo of Modbus/tcp in VB

这个是一个vb编的GPS程序的源代码，呵呵希望对大家会有所帮助！-this a vb series of the GPS program s source code, as long as you will want to help! -This is a series of GPS procedures vb source code,呵呵hope will be helpful to everyone!-this a vb series of the GPS program s source