Changing Fieldcatalog of FBL5N output

Hi Folks,

I have a requirement for which I have copied the standard program (RFITEMAR) for txn FBL5N.

My ZFBL5N is running fine, but the only thing I am not able to achieve is to change the column headings of the output, i.e., I want to change the SELTEXT parameter of the fieldcatalog for most of the output fields.

More precisely, I want to display "Entry Date" instead of "Pstng Date", "Entry No." instead of "Document No." and so on.

I understand that the column headings are picked up at runtime from the structure RFPOSXEXT. I want to change the headings but do not know how to go about it.

Request your guidance to achieve my requirement.

Thank you in advance.

Regards,

Sud