Haven't you ever met with http:// or ftp:// links with unknown file size. Sometimes, file size is determined incorrectly. But now it is a not problem with InternetFileSize. Now you can easily determine file size, type and modification date in the Internet. Moreover, if your base http or ftp link is "encoded" (such as http://www.server.com/downloadfile?id=34532), this shows real file http or ftp path.