Error 42 When Trying to Interop with a C# Libary

[John C via Digitalmars-d-learn]

On Saturday, 5 November 2016 at 21:02:14 UTC, Adam D. Ruppe wrote:
> coff2omf works with .obj files

Well, that's not what the docs say! 
http://www.digitalmars.com/ctg/coff2omf.html

   "The input files can be either object files (.obj) or library 
files (.lib)"

Apparently you have to convert them to an older COFF format first 
using Microsoft's linker. Not sure if I ever tried that though.