BAPI to pull invoice PDF

[Former Member]

I am completely new and unfamiliar with SAP and its data structure but I have been given a legacy application that uses BAPI. The app does one thing. A user can upload an Excel file that has a list of invoice numbers and PO numbers in it. The app parses the Excel then goes into SAP and retrieves all of the PDFs (original scanned invoice) related to those invoices. It works well. This is all done through a C#.Net website using BAPI to call an IBM ISeries instance of SAP.

Now we are moving to a Windows-based version of SAP and the users want to maintain the functionality. I know nothing about BAPI other than the one or two functions that are used to call the IBM. Those lines have been pretty much copied and pasted from one version to the next. I can keep it running but that's about all.

My questions are...

Can I continue to use the same code to call a Windows instance of SAP (just change the server name, username and pwd)?

If not, is there a C# example somewhere that I see how this is done?

Any links to any examples or tutorials on BAPI might be helpful.

Thanks ---Marty