等待子进程退出的问题
CreateProcess创建子进程，WaitForSingleObject等待子进程退出，都没问题

现在情况是子进程可能又启动了其他进程，我需要等所有子进程退出后WaitForSingleObject才返回，该怎么处理？

[解决办法]
遍历进程快照？
[解决办法]
让子进程也WaitForSingleObject等待它的子进程退出
[解决办法]
道理一样吧，子进程也要用WaitForSingleObject等待子子进程初始化结束
[解决办法]
最标准的方法：使用作业（Job）对象。

http://msdn.microsoft.com/en-us/library/windows/desktop/ms684161(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/ms684847(v=vs.85).aspx#job_object_functions

Windows系统中使用“作业”来管理一组相关进程。A job object allows groups of processes to be managed as a unit. Job objects are namable, securable, shareable objects that control attributes of the processes associated with them. Operations performed on a job object affect all processes associated with the job object. Examples include enforcing limits such as working set size and process priority or terminating all processes associated with a job.