Hi srinu,
"Entry_NEU" is a default form routine for Purchase Order. Main functionality of this Routine is establishing link between Print program, Smartform/SAP Script with the standard transaction.
This routine is written in the print program and "NAST" table has a field called "OBJKY". Your purchase order no is assigned to this objky and rest of the information i.e., required to display in Purchase order logic is written within this form. so that it will catch all the required data and print as output in the form.
"NAST" table contails the following details also apart from holding the Object Key value. It also contains Application data for maintaing direct output from TCode.
See some important fields in NAST table which is more helpful for any standard transaction output.
KAPPL SNA_KAPPL CHAR 2 0 Application for message conditions
OBJKY NA_OBJKEY CHAR 30 0 Object key
KSCHL SNA_KSCHL CHAR 4 0 Message type
SPRAS NA_SPRAS LANG 1 0 T002 Message language
PARNR NA_PARNR CHAR 10 0 Message partner
For printing Invoices, Delivery orders, Purchase orders we will have different Application types, also OBJKY holds the corresponding Delivery, Billing and Purchase order no's. Rest of the data is taken into consideration based on the applications.
Regards,
Santosh Kumar M.
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