  We discuss weak-vector-boson scattering, at next-to-leading order in QCD,
within the framework of hadronic structure functions. We use this approach to
calculate the Higgs-boson production cross section via vector-boson fusion at
the LHC/SSC; we find a modest increase over the leading-order prediction. We
also give expressions for the distribution of vector bosons in a proton
(effective-$W$ approximation) including ${\cal O} (\alpha_s)$ corrections.
