Highly scalable, reliable local folder watcher component suitable for use in client or server environments under any load. Uses advanced Win32 programming techniques like low level file system notifications, asynchronous I/O, adaptive internal queue and I/O completion ports to achieve utmost reliability: it never, ever misses a file arrival even under extreme load. The component can be used as a C++ class and linked into an application or serve, or as a free-threaded COM component.