VB调用外部程序，并监视程序的运行状态，若程序关闭了，会给出提示。也就是在VB程序内部调用其它的程序，也许仅是一条简单的命令而已。-VB calling external programs, and monitor the running state, if the program closes, will give tips. That is, within the VB program calls other programs, perhaps only a simple command only.