  Production of large-p_T hadron pairs by polarized photon on a longitudinally
polarized proton towards probing the polarized gluon distribution is studied.
Resolved photon contributions and the effect of changing the scales are taken
into account, and predictions are presented. A very recent experimental result
at c.m. energy 7.18 GeV is compared to our predictions extented down to this
energy. A proper combination of cross sections is also considered.
