Trace not working in a .NET DLL loaded from VB6 EXE

Question

I have a .NET DLL that writes to the Trace. But it seems that when I call my DLL from a VB6 EXE the trace is not working.

I have created an myApp.config

Answer 1

I think the problem is that VB6 is using COM to load your managed DLL.

The .NET code won't load your .config file as it uses a single 'shim' handler for all COM Interop.

The best you might be able to do is to add something to your machine.config file (but most people don't like doing that).

Initialising tracing in code should work though. Remove your tracing configuration from the managed .EXE and run it in a debugger to check that the code version works there too.