We report the results of a search for the Theta*++ pentaquark in the decay B+ -> 
Theta*++ pbar where Theta*++ -> pK+ using 81fb^-1 of data collected on the 
Upsilon(4S) resonance with the BaBar detector at PEP-II. We find an upper limit on 
the branching fraction of B+ -> Theta*++ pbar where Theta*++ -> pK+ to be 1.5x10^-7 
for 1.43<m(Theta*++)<1.85GeV/c^2, 2.4x10^-7 for 1.85<m(Theta*++)<2.00GeV/c^2 and 
3.3x10^-7 for 2.00<m(Theta*++)<2.36GeV/c^2, at 90% confidence level. All results are 
preliminary.