wicontrol(8) was obsoleted, all wireless configuration is done via
ifconfig(4) now.. in fact, that utility was removed in OpenBSD 4.0.
The method of scanning for access points has gone through a couple variations.
OpenBSD <= 4.4:
$ sudo ifconfig int? -M
(..This shows a list of supported channels now, it doesn't scan for channels..)
OpenBSD == 4.4-CURRENT to early 4.5-BETA:
$ sudo ifconfig int? chan
OpenBSD >= 4.5-RELEASE:
$ sudo ifconfig int? scan
Hopefully this will clear things up, please read
ifconfig(8) for more information and examples.. also read driver specific man pages as mentioned by
ocicat.
Good luck..