B[e] stars at the highest angular resolution: the case of HD87643

New results on the B[e] star HD87643 are presented here. They were <P />obtained with a wide range of different instruments, from wide-field <P />imaging with the WFI camera, high resolution spectroscopy with the <P />FEROS instrument, high angular resolution imaging with the adaptive <P />optics camera NACO, to the highest angular resolution available with <P />AMBER on the VLTI. We report the detection of a companion to HD87643 <P />with AMBER, subsequently confirmed in the NACO data. Implications of <P />that discovery to some of the previously difficult-to-understand <P />data-sets are then presented.