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Editorial Team
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Asked: 2026-05-15T23:56:01+00:00

I have a C# ComServerProject that implements an out-of-proc COM server, and I’ve selected

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I have a C# ComServerProject that implements an out-of-proc COM server, and I’ve selected the option “Make assembly COM-visible” on server project’s “Assembly Information” dialog. In the same solution I have a C++ ComClientProject that should use the COM interface defined in ComServerProject. However, I don’t know how to actually use the interface defined in the server in my C++ client.

All of the Google search results say that you should do #import "ComServerProject.tlb" to import the type library from the COM server. But there is no .tlb file created during the build! I also tried checking the “Register for COM interop” box on the Build tab of the server project properties, but it still didn’t create a .tlb file. Plus, it required me to run VS elevated, which I would like to avoid.

How can I get VS2010 to actually create whatever files are necessary to have a usable COM server?

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1 Answer

  1. Editorial Team

    Use Tlbexp on the generated assembly to create the .tlb.

    Something like:

    tlbexp ComServerProject.dll /out:ComServerProject.tlb
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