[Kuk]

@Nitzer, el BY VALUE 0 no lo puede ser, como dice @fastpho.

Tienes que elegir uno de los siguientes valores:

❞ FILE_NOTIFY_CHANGE_FILE_NAME 0x00000001 Any file name change in the watched directory or subtree causes a change notification wait operation to return. Changes include renaming, creating, or deleting a file name. FILE_NOTIFY_CHANGE_DIR_NAME 0x00000002 Any directory-name change in the watched directory or subtree causes a change notification wait operation to return. Changes include creating or deleting a directory. FILE_NOTIFY_CHANGE_ATTRIBUTES 0x00000004 Any attribute change in the watched directory or subtree causes a change notification wait operation to return. FILE_NOTIFY_CHANGE_SIZE 0x00000008 Any file-size change in the watched directory or subtree causes a change notification wait operation to return. The operating system detects a change in file size only when the file is written to the disk. For operating systems that use extensive caching, detection occurs only when the cache is sufficiently flushed. FILE_NOTIFY_CHANGE_LAST_WRITE 0x00000010 Any change to the last write-time of files in the watched directory or subtree causes a change notification wait operation to return. The operating system detects a change to the last write-time only when the file is written to the disk. For operating systems that use extensive caching, detection occurs only when the cache is sufficiently flushed. FILE_NOTIFY_CHANGE_SECURITY 0x00000100 Any security-descriptor change in the watched directory or subtree causes a change notification wait operation to return.