Transfer PO info from PO to vendor invoice

Hello,

I would like to transfer a field value from PO to vendor invoice when user is creating vendor invoice from PO. for example i wish to transfer requester value from PO to vend invoice. I went to the code and it looks very tricky. Can anybody please help me with this?

Thank you

From which table to which table? PurchTable to VendInvoiceInfoTable?

yes kranthi…from purchtable to vendinvoiceinfotable

Start looking from \Classes\VendDocumentTableType\initFromPurchTable