Scripting.encoder object documentation

Greetings,

    I need to encode a vbscript (actually in a HTA). Someone has srcenc but it only runs on win xp.

   I have found a script which does the encoding which uses the "Scripting.encoder" object that works fine on windows 7.

   However, I cannot find any documentation on the properties and methods of this object. Does it exist anywhere?

Thanks

David Z