shdocvw.dll ieframe.dll

I have an mdb that I created in Windows7 64bit, reference to "C:\Windows\Syswow64\ieframe.dll". It works fine.

As soon as I use the same mdb in Windows XP, it fails "class does not support automation or does not". If I change the "Microsoft Internet Control" to shdocvw.dll (instead of ieframe.dll) in Windows XP, it works. When I bring it back to Windows 7, it still works fine.

How come the ieframe.dll does not work in Windows XP?
How come I can't reference shdocvw.dll in Windows 7? "Microsoft Internet Control" keeps referencing back to ieframe.dll?
Otherwise, is it possible to detect which window and reference it during runtime?

Thanks