I have got a C++ unmanaged dll. I have no sources of this dll and I need to use it in ATL project
But I always get an error "Retrieving the COM class factory for component with CLID {id} failed due to the following error: 80040154 class not registered"
I have tried to register that dll using regsvr32, but no success I have read lots of tutorial, but all they explain how to created ATL project from scratch. And they do not use ordinary dlls
How can I solve this?
All my previous ATL project were 32-bit. And everything was working fine.
This project was 64-bit. I've found out that Visual Studio has a bug: MSBuild ignores linker option "Register Output: Yes" for x64 Platform
Workaround 1 (from the link above):
<Target Name="RegisterOutput"
Condition="'$(EmbedManifest)'=='true' and '$(LinkSkippedExecution)' != 'true' and (('$(Platform)' == 'x64' and ('$(PROCESSOR_ARCHITECTURE)' == 'AMD64' or '$(PROCESSOR_ARCHITEW6432)' == 'AMD64')) or '$(Platform)' == 'Win32')">
Workaround 2 (I had C# project in the same solution, so I've used this one):
Add regsvr32 path_to_cpp.dll to post-build event
Note: you should not add regsvr32 to pre-build as it will not always execute (another source of problems)
From MSDN:
Pre-build events do not run if the project is up to date and no build is triggered.