When I Use SHChangeNotifyRegister to register a notification, the
SHCNE_NETUNSHARE never posted though I unshare the folder.
And the more, If I share/unshare folder in explorer, the folder's property
in my program is wrong.
Such as, though I unshared the folder through explorer, But in my program it
is still in shared status, It seemed the shell cache the attributes(I use
pFolder->getAtrributesOf to retrieve the atrribtes, no matter whether I
specify the SFGAO_VALIDATE flags).