ActiveX Object Version Detection?

<object ID="CustomUI" CLASSID="CLSID:7B3F3E1C-2E1F-46C9-9F31-82E8F03F7014" CODEBASE="GAAFBUDGV3900.CAB#version=3,9,0,0"

Lets assume I have above object in my html... if the version changes from 3,9,0,0 to 4,1,0,1... I need to be able to detect that the users computer has the wrong version and force them to wait till the newer version completely downloads.

Any ideas? I can handle forcing them to load the new one... but I can't find anywhere that shows how to detect the version of their object. I need to do it w/o requiring them to allow all sorts of permissions to internet users.

I could wait till they get into the object and have it compare its own current version to the version # stored in a db or something...

I'd love it if this could be done from the .asp page they use to load and go into the object, though.

Thanks in advance!

Rock

I've been having problems with codebase. I can get mine to download but not register.

Everything I've read, I think it is supposed to look at the version number and if it's greater, it should replace it.