Implementation of WHO Columns in forms

1)Select All the WHO Columns in the Datablock

2)define following Two Triggers at DataBlock level
1)Pre-Insert 2)Pre-Update

3)Call the following API from both the Triggers FND_STANDARD.SET_WHO():

Standard Libraries Contains all these API's.we can download all these Libraries from Resource folder in AU_TOP.

APPDAYPK : It will Support for All CAlendar and Date time Functions
FNDSQF : It Will support for al the Flexfield,profile,WHO Columns functionality.