  The dijet cross section as a function of both the fraction of the photon
momentum participating in the hard process, x_\gamma^{OBS}, and the photon's
virtuality, Q^2, is compared with the predictions of Herwig 5.9 for various
photon parton distribution functions. The ratio of dijet cross sections with
x_\gamma^{OBS} < 0.75 and x_\gamma^{OBS} > 0.75 is measured as a function of
Q^2. This ratio is found to decrease as Q^2 increases consistent with the
hypothesis that the photon parton distribution functions decrease with
increasing photon virtuality.
