[C++]监控特定文件夹的事件：三种解决方法汇总
<iframe align="center" marginwidth="0" marginheight="0" src="http://www.zealware.com/csdnblog336280.html" frameborder="0" width="336" scrolling="no" height="280"></iframe><div class="postText">监控特定文件夹的事件：三种解决方法汇总<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />LDBIVR程序中要监视特定文件夹的文件落地或者删除事件，本来要用SHELL中的事件通知机制，后来因为要考虑到各种意外事件，如服务意外退出、服务器崩溃等，遂作罢。
对于目录事件异步通知，大致有三个方法：
调用Windows的api函数ReadDirectoryChanges监视指定目录中文件（推荐使用），这个使用异步IO：
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/readdirectorychangesw.asp
The ReadDirectoryChangesW function retrieves information that describes the changes within a directory.
To track changes on a volume, see change journals.
BOOL ReadDirectoryChangesW(
HANDLE hDirectory,
LPVOID lpBuffer,
DWORD nBufferLength,
BOOL bWatchSubtree,
DWORD dwNotifyFilter,
LPDWORD lpBytesReturned,
LPOVERLAPPED lpOverlapped,
LPOVERLAPPED_COMPLETION_ROUTINE lpCompletionRoutine
);
或者用SHChangeNotifyRegister和SHChangeNotifyDeregister来注册事件SHChangeNotify：
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/shellcc/platform/shell/reference/functions/shchangenotify.asp
SHChangeNotify Function
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