By using some of functionModules like
in both AS,PS we have to create internal table
1)UP-LOAD
2)DOWN-LOAD these are used if the data is in Presentation
Server
3)READ-DATASET
4)TRANSFER these are used if the data is in Application
Server
(Or)
By using Manualprogramming
like BDCDATA structure
there we have fields like program,dynpro,dynbegin,fname,fval

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