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I took a COM DLL and used tlbimp to create a DLL I could use in my .net 3.5 project. I’m getting an error though when try to use the COM interface and I’m wondering if I still need to register the COM dll on the server the app will be installed on? If so, which DLL do I register, the one created with tlpimp or the original one I used with tlpimp?
Yes. The .NET type library that is generated is just a managed wrapper – the original COM Lib must still be registered.
Usually with
regsvr32.exe. You would use that on the original that you used with tlbimp. Better yet, if it gets installed with an installer like an MSI, use that instead.