HCM Processes & forms

Hi Experts,

I have a requirement related to HR Processes (Hiring action of an employee). yearly a company recruiting >500 employee, for this process to automation they suggest us to develop HCM Processes & forms ( For designing APPOINTMENT LETTER ). this action is between HR Administrator and an employee.

Actual process:-

HR Admin clicks a link on the portal and it asks for PERNR number HR Admin entered the PERNR and clicks on SUBMIT button, then an INTERACTIVE PDF FORM should be displayed(We designed already in HRASR_DT transaction) after the form(pdf form) has been filled by HR Admin and he transferred that form to HR Specialist he need to APPROVE or REJECT it(Work Flow concept is also there).

Problem that encountered during the process:-

We designed the form in the HRASR_DT transaction, but where to write the code for this HCM Processes & forms to replicate the fields on to the form. i found there is an option that BADI implementation has to be implement.

I also tried to replicate the field values on to the form using badi implementation but it could not helpful.

Finally what i am expecting from you is 'how to handle the fields in the a HCM form and where we have to write the code to replicate the field values on the HCM form'

Thank you,

B. Raghu Prasad.