If wzc is running you won't succeed (for long) using an oid.
The app in the sig does it, so it is possible, at least
switching APs, and having it stick. Here's a pic:
http://iplay.40th.com/iplaycs_rssi.html
Bottom, center pic shows an adhoc (mp3) and a couple
of AP networks (juniper/basil). I can switch among
the APs no problem, so long as wzc is set to access
"All available" or "Only access points". If it's set
to "Only [adhoc]" then I could switch among only those.
I can't switch out of the network type, though. Also,
"All available" isn't true -- it only ever does APs
in that mode. To get adhocs to show you have to set
it to "Only [adhoc]".
I'd like to tell you that it's easy to do, but it
probably isn't. It probably should be, but these
APIs are poorly, if at all, documented, and maybe
destined to be abandoned anyway, to be replaced
by an even more obscure, for-gurus-only API. I
wonder who thinks up these things that no one could
ever understand fully. He probably has two heads
and sees in the dark.
(Obligatory good luck!)