We need to have a lookup field to a custom module's record in Zoho CRM. But it appears that look-up fields are not enabled in Meetings/Events module in Zoho CRM.

How do I design/implement a custom look-up type field that will lookup records from custom module and enable users select and store the selected record in Meeting record and asscoiate/create a related record in the meeting record? Similarly and more importantly, the event/meeting record will be stored as related record in the custom module - record just like it is stored and associated for Contacts.