How to fetch UDF fields in purchase register

Hello Every Members,

Can anyone guide me for how to fetch UDF fields in Purchase register. I have made four UDF fields in Purchase vouchers and i want to fetch them in Purchase register as columnar details.

I have created four UDF field of P.O. No., P.O. Dt., GRN No., GRN Dt. & Bill No. Bill Dt. is predefined in tally. I want to view all of them in Purchase Columnar Register

I