component versions - 32-bit or 64-bit?

[Fazan]

According to MFC documentation, when you're writing an ActiveX
component and you want to define its version, you are limited to a
32-bit number.

http://msdn.microsoft.com/library/en-us/vclib/html/_mfc_COleControl.3a3a.ResetVersion.asp?frame=true

But when you refer to the component, each of the major and minor
versions can be 32 bits long, so the component can have a 64-bit
version number:
http://msdn.microsoft.com/workshop/networking/moniker/reference/functions/cogetclassobjectfromurl.asp
http://msdn.microsoft.com/workshop/delivery/download/overview/managing.asp#mngver_spec

Anyone have a clue what's going on?

TIA,
Faz