Search for the decay B(0)-->D(*0)gamma

: We report results of a search for the rare radiative decay B(0)-->D(*0)gamma. Using 9.66x10(6) BB meson pairs collected with the CLEO detector at the Cornell Electron Storage Ring, we set an upper limit on the branching ratio for this decay of 5.0x10(-5) at 90% C.L. This provides evidence that the anomalous enhancement is absent in W-exchange processes and that weak radiative B decays are dominated by the short-distance b-->sgamma mechanism in the standard model.