how to populate a new field added in purcheditlines form??

i have added new stringedit in Purcheditlines form, i want to fill the stringedit and post the invoice and i want to populate the string in vendinvoicejour while posting and need to view the string i entered while posting in vendinvoicejour from for that order.

where i should write the coding to populate the stringediit added???

because purcheditlines form doest have the vendinvoicejour datasource…

Why didn’t you add it as a field to PurchParmTable or another “parm” table? (What’s the most appropriate place depends on what the value represents.)

what “the value represents” means?

The purpose. What your field means, what other data it relates to, at what level you need the information stored in it…

thank you