This is an ActiveX DLL project (object class), which only has 2 method: Register and Unregister as well as a series of events, these events are fired when: a file is deleted, created, renamed or changed in the file system (providing full path and file system item PIDL), when CDs are inserted or removed from CD-ROM drive, when folders are created removed or renamed (providing full path and folder PIDL) and other shell events. Actually, this is System activity logger class.