In addition to Jan's questions: is your AddIn in-process (a DLL) or out-of-process (an EXE)?
How is the AddIn installed? The installation process should register the AddIn's COM components with Windows.
In addition to Jan's questions: is your AddIn in-process (a DLL) or out-of-process (an EXE)?
How is the AddIn installed? The installation process should register the AddIn's COM components with Windows.