Create a new object for the lines, and set a browse filter.

Gotcha. I get the concepts, but I'm not sure how to execute one part of that. How do I create a new object for the lines when I'm in the lines already? Can you help me out? Here's what I would have if I was on the Header or Totals tab:

Set oLines = oBusObj.AsObject(oBusObj.Lines)

What would be the equivalent of that on the Lines? Thanks!

You don't use oBusObj, you create a new header object, and grab the oLines from that.
oHeader = oSession.GetObject("SO_SalesOrder_bus")
if oHeader <> 0 then
Set oHeader = oSession.AsObject(oHeader)
else
...
But this might not work if you already have the order open, since it will be locked for editing already. I've only done this for a service object to read data, not a business object to write data. Your only option might be to have your script trigger from the header table.

I see. Thank you very much for your help!

Thanks for this Kevin! It coincidentally helped me with something else and I would have been in a pickle otherwise! Yes.. I said pickle. :)