Please refer to the attached Powerpoint presentation.
https://communities.bentley.com/cfs-file/__key/communityserver-wikis-components-files/00-00-00-00-30/UsingVRTtoImportODBC.ppsx
Source:
http://communities.bentley.com/products/geospatial/desktop/m/geospatial_desktop_gallery/218385.aspx