How to include shipping prices in an order data set?

Where can I find examples or descriptions about shipping handling in orders?

I use successful the DI Server AddObject method to create an order and at this time I used the DocumentsAdditionalExpenses rows to add shipping price to the order, but on this way I do not have any reference to any configured shipping method like the ShippingMethod and ShipDate property in the Document_Lines rows.

If there any property in the Documents rows to define a general shipping method of the whole order and force the expenses calculation based on the SAP B1 configuration in this company database?

And then additional the similar issue with any Payment expenses...

Thank's for help and any suggestions

Heiko