지정폴더 감시 API

http://funnymins.tistory.com/80

관련함수
FindFirstChangeNotification
http://msdn.microsoft.com/en-us/library/windows/desktop/aa365261(v=vs.85).aspx

WaitForMultipleObjects
http://killins.egloos.com/1566005
http://www.joinc.co.kr/modules/moniwiki/wiki.php/man/4200/WaitForMultipleObjects