Windows provides the resource file for version information for an application and DLL. The resource file includes information like version, copyright and manufacturer.
The short version is that you do this via the soname of the library. Read chapter 3 at http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html as well as chapter 3.3 ABI Versioning at http://www.akkadia.org/drepper/dsohowto.pdf