newby here with a quick question about custom fields. Is it possible to set up a custom field that queries a non-civicrm table? Hoping to create an autocomplete dropdown menu that does a SELECT on a legacy table we have. Am I looking in the right direction when I browse this page: https://wiki.civicrm.org/confluence/display/CRMDOC/hook_civicrm_custom ?
Thank you so much! johnnyeng