How to add customized fields(POITEM) to the BAPI_PO_CREATE1

Hi All,

There is a requirement to post PO with BAPI 'BAPI_PO_CREATE1'.  In this case, there are few customized fields in line level (POITEM ). i need to post PO with these customized fields.

i extended the BAPIMEPOITEM and BAPIMEPOITEMX with customized fields. li try to post it through the EXTENSIONIN. 

Anyway , i could not post the PO with customized fields. Can you help me to solve this . Appreciate if you could provide some sample code.

Thanks in advance,

Rehan