  We present the first public code for the calculation of the astrometric
centroid shift occurring during microlensing events. The computation is based
on the contour integration scheme and covers single and binary lensing of
finite sources with arbitrary limb darkening profiles. This allows for general
detailed investigations of the impact of finite source size in astrometric
binary microlensing. The new code is embedded in version 3.0 of
VBBinaryLensing, which offers a powerful computational tool for extensive
studies of microlensing data from current surveys and future space missions.
