Created On:  12 January 2012

Problem:

Is there an example of Net Express 4.0 unmanaged code (Not the .net version) calling into a VB or C# .NET DLL.

Resolution:

To do this you need to use COM on the cobol side and use regsam on your assemblies so that they accessable via COM Interop.

To explictily put the location of the assembly in the registry then you would need the /codebase option to regasm.

Example using COBOL and C# is attached.