Is there anyway to set the EntityFieldName on a mainview to a field that is in an extension table? For example, i have a Ticket_Ext table with a custome ticket_numb field i want to put in the entityfieldname.

Have you looked at the MAINVIEW itself?

MainAXForm: mvTicketDetails......EntityFieldName, QuickFindLookup, etc.

I have looked at the mvTicketDetails.  What i need to know is the syntax to set the value of the property.  I have a QickFindLookUp based on the custom field with the syntax of TICKET:TICKETID=TICKETID.TICKET_EXT!TICKET_NUMB.  I tried the same in the EntityFieldName property and it didn't work.