文件变化监控ReadDirectoryChanges APC
APC是“异步过程调用(Asyncroneus Procedure Call)”的缩写
https://blog.csdn.net/qq229596421/article/details/77828647
// This call needs to be reissued after every APC.
BOOL success = ::ReadDirectoryChangesW(
m_hDirectory, // handle to directory
&m_Buffer, // read results buffer
m_Buffer.size(), // length of buffer
m_bIncludeChildren, // monitoring option
m_dwFilterFlags, // filter conditions
&dwBytes, // bytes returned
&m_Overlapped, // overlapped buffer
&NotificationCompletion); // completion routine
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