  We present measurements of branching fractions and CP-violating asymmetries
for neutral B meson decays to two-body final states of charged pions and kaons
based on a sample of about 88 million Y(4S)-->BB decays. From a
time-independent fit we measure the charge-averaged branching fractions
B(B0-->pi+pi-) = (4.7 +/- 0.6 +/- 0.2) x 10^-6, B(B0-->K+pi-) = (17.9 +/- 0.9
+/- 0.7) x 10^-6, and the direct CP-violating charge asymmetry A(Kpi) = -0.102
+/- 0.050 +/- 0.016; [-0.188,-0.016], where the ranges in square brackets
indicate the 90% confidence intervals. From a time-dependent fit we measure the
B0-->pi+pi- CP-violating parameters Spipi = 0.02 +/- 0.34 +/- 0.05;
[-0.54,+0.58] and Cpipi = -0.30 +/- 0.25 +/- 0.04; [-0.72,+0.12].
