Basic Steps:

1.Define a lookup, lookups value are for drop-down list items.

2.Create VO, this is used to query above lookups

3.in Page file, Add a messageChoice type item in a region.

4.Drop-down list with static items

Similar Posts

https://blogs.oracle.com/prajkumar/entry/implement_poplist_in_oa_framework

http://newtonapples.com/message-choice/