  We report the results of a search for T, CP and CPT violation in B0-B0bar
mixing using an inclusive dilepton sample collected by the BaBar experiment at
the PEP-II B Factory. Using a sample of 232 million BBbar pairs, with a
simultaneous likelihood fit of the same-sign and opposite-sign dileptons, we
measure the T and CP violation parameter |q/p|-1 = (-0.8 +/- 2.7(stat.) +/-
1.9(syst.))e-03, and the CPT and CP parameters Im(z) = (-13.9 +/- 7.3 (stat.)
+/- 3.2(syst.))e-03 and DeltaGamma x Re(z) = (-7.1 +/- 3.9(stat.) +/-
2.0(syst.))e-03 ps^{-1}. The statistical correlation between the measurements
of Im(z) and DeltaGamma x Re(z) is 76%.
