Microsoft Knowledge Base Article 318764 contains the following summary:

This step-by-step article describes how to use the File Version Script tool (Fileversion.pl) to display version information about files that reside on local and remote Microsoft Windows 2000-based computers.

The File Version Script tool is available in Microsoft Windows 2000 Resource Kit Supplement 1. Use this script tool to display the version number of files on NTFS volumes of local or remote computers. If the file is copyrighted, you can display the name of the company that holds the copyright. Executable (.exe) files and dynamic link library (.dll) files are examples of copyrighted files. Fileversion.pl also displays information about other file properties such as file size, location, and the date and time the file was last modified.

The version information that Fileversion.pl displays corresponds to the information that appears on the Version tab of the Properties dialog box of a copyrighted file. To view this information in Microsoft Windows Explorer, right-click a copyrighted file (for example, Winhlp32.exe in the Winnt folder), click Properties, and then click the Version tab.