A manual addressing plug-in development is provided by the <a href="http://www.mikepoweredbydhi.com/-/media/shared%20content/mike%20by%20dhi/flyers%20and%20pdf/product-documentation/feflow%206.2%20user%20manual.pdf">FEFLOW Users Manual</a>, Chapter 16 entitled [b]Plug-ins and Interface Manager IFM[/b]:
Available callbacks and API functions are listed in the FEFLOW Help.