Thanks Sukrut
As you said "Changing any standard objet is not allowed from 8.0 onwards" Means You mean to say Table extensions > SalesTable.Extension correct? Instead of this i need to create our own extension for SalesTable to perform.
So, if i work with any standard objects like EDT, Base enums, forms , Class etc... So, need to create our own extension to perform further correct?
Please give me more shed on this.