Issue with unmanaged C++ code calling into unmanaged VB.NET assembly

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Hi All,
I need help with a .NET COM Interop issue.

I have a .NET assembly (a single DLL with classes written in VB.NET )
that I register for COM interoperability using Visual Studio. An
unmanaged C++ application #imports the .tlb of this .NET assembly.
Everything is built and it runs fine. We have associated GUIDs to each
of the classes that are used by the C++ client application.

If a change is made to the .NET Assembly (not changing interfaces) and
I rebuild it and then I overwrite the old DLL with the new one and
re-register using regasm /Codebase , the C++ client application crashes
when its run. I must re-build the C++ application using the .tlb file
generated from the latest .NET assembly DLL before it will work again.


I should not have to rebuild the client application to get it to work
properly if no interfaces have changed.

Any advice would be appreciated.

Thanks
Tim DeMarco

.

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