基于串口，用于VC6.0的程序源码，对单片机串口更新有用,no

这是一个利用at指令在vc++环境编写利用笔记本的com口控制modem拨打公用电话网电话的程序，程序调试可用。-This is a use at command in vc++ Environment prepared to use the notebook to control the com port PSTN modem dial telephone procedures can be used for program debugging.