BADI ME_PROCESS_PO_CUST

Hi

I need to use BADI ME_PROCESS_PO_CUST - Method CHECK for validating ME21N - PEP element.

I can read the header and the elements but i don't know how to acces GET_ACCOUNTINGS method and their values.

What can i do.

Another one:

How can i configurate SAP Business WorkPlace my e-mail in internet, name, ....

Best Regards