Vendor Name in Item Line of Purchase Order

There is a disabled field shown in item line of purchase order named Vendor Name. What is it? andHow to get VAlue there?

RESULT and REASON

The value of vendor in item line is based on the item selected and Supplier selected for the Purchase order.

The Vendor name actually is the supplier code that we give in the item record under.

How to provide Vendor Code:

Identify a vendor that is to be associated with the item. Go to item record.

Navigation: List >Account>Item

1. select the item.
2. Edit it.
3. Go to- purchases and inventory subtab; Click on supplier tab
4. Under Supplier:
   1. Select the identified suppler to associate with item
   2. provide the code for supplier

5. Save the item Record.

Now try to raise the Purchase order and while selecting this supplier and that ltem we can see the code in the field of Vendor Name in Item Line.