Visual C++ 6.0编写的使用RAS拨号软件源代码 ，使用了多线程编程和网络编程中的几个RAS API函数，对gprs数据通信编程有较好参考作用。-Visual C++ 6.0 prepared using RAS dial-up software source code, the use of multi-threaded programming and network programming in several RAS API function, gprs data communi