两个进程互相监视,来实现QQ的关闭.如果想关闭的话,必须在进程管理器中关闭进程树来实现,而且它们的窗口是不显示的.-two mutual surveillance process to achieve the closure of QQ. If you want to close the case, management of the process must be shut down for the process to achieve the tree, and their window i