constants ChangeEnum
Specifies the state for a file or a folder. Use State property to get the change state. The file or folder's state is valid while the file object is contained by collection passed by the Change event. Use the Folder property to specify whether the File object refers a file or a folder. 

NameValueDescription
Unchanged0 The file or the folder is unchanged.
Changed1 The file or the folder  is changed.
Added2 The file or the folder is added
Deleted3 The file or the folder is deleted.