OA Framework Extension / Substitution question

Question

OA Framework Extension / Substitution question:
I am not sure how to do the following, any input will be helpful. Thanks in advance.
Oracle Application has a page on table “FND_NEW_MESSAGES” – Related Entity object is “FndNewMessagesEO” and View object is “FndMessagesResultSetVO”. Primary key on this table is “APPLICATION_ID, MESSAGE_NAME and LANGUAGE_CODE”. I want to extend this page and add my own table say “CUST_FND_NEW_MSG_EXT” with the same primary key and has an extended column “EXTRA_MESG1”.
How do I extend this page to include my new table / column and make select/update/insert work?
Questions:
1.     Should I create EO for my new table say CustExtEO
2.     Create an association between FndNewMessageEO and CustExtEO
3.     Then create CustExtVO and extend FNDMessagesResultSetVO and build view on FndNewMessageEO and CustExtEO and then perform substitution?
Or
1.     Should I create EO for my new table say CustExtEO
2.     Create CustExtVO
3.     Create an View Link between FndNewMessageVO and CustExtVO
4.     Then what??
More questions:
1.     Can I achieve this by not writing any code?
2.     Can the EO Association or View Link automatically insert / update my new table after I do the substitution?
3.     FndNewMessageVO has join to tables “FND_NEW_MESSAGES, FND_APPLICATION_VL, FND_LANGUAGES_VL, FND_LOOKUPS” – when you do an insert / update how does OA Framework know that it has to insert / update the corresponding tables?

Answer 1

Well, if you want to have the page based on your custom table, then you will have to create new VO, EO. You cann't use extension in that case.
1. Can I achieve this by not writing any code?No.
.2. Can the EO Association or View Link automatically insert / update my new table after I do the substitution?You need to have new EO, VO based on your new table.
3. FndNewMessageVO has join to tables “FND_NEW_MESSAGES, FND_APPLICATION_VL, FND_LANGUAGES_VL, FND_LOOKUPS” – when you do an insert / update how does OA Framework know that it has to insert / update the corresponding tables?
EO handles all the insert, update.
For more details go through the Dev guide.
--Shiv