I am using VB .NET 2003

Assume I have the following tables:

==ORDERS==                ==ORDER_PRODUCTS==
OrderID (PK)              OrderProductsID (PK)
Field1                    OrderID (FK)
Field2                    ProductCode (FK from anothertable)
Field3                    Field1
etc                       etc

ORDERS, 1 ---------------- M, ORDER_PRODUCTS
(Linked via OrderID)

ORDERS, 1 -------- M, ORDER_PRODUCTS
(Linked via OrderID)

I have created the relationship for this in the XML Schema (the XSD
file), let's call it ORDERS_ORDERPRODUCTS

Now what I want to do is create a new order. So I add a new row to
ORDERS and then use my ORDERS DataAdapter to save the changes. But
since the OrderID is a PK autonumber it gets generated automatically.
So how do I know what the OrderID foriegn key is?? I need it to link my
Order and the Product. I suppose I could use:

dsDataset.Orders.Rows(dsTurbobraze.Orders.Rows.Count -
1).Item("OrderID").tostring

to get the auto-generated OrderID of the last added row, but what if
some Orders have been deleted from the DataBase in the past? The
OrderID's woudn't go up nicely in sequence, or would ADO keep a hidden
record of every OrderID, and never use it again?

How do I solve this seemingly easy problem?