To enable compatibility with an existing XLL, I want to identify the equivalent XLL in the manifest of my Excel add-in. My existing add-in is using XLL technology, but it does this by using 3rd party libraries of Add-In Express. So in my case the custom functions also are contained in the dll which also contains the COM UI part of the add-in. So I have no physical xll file.
Since I found the information that for equivalent COM add-ins, Excel searches in the following locations for a matching ProgId
- Computer\HKEY_CURRENT_USER\Software\Microsoft\Office\Excel\Addins
- Computer\HKEY_LOCAL_MACHINE\Software\Microsoft\Office\Excel\Addins
What is the respective location where Excel is looking for matching XLL files?
I would like to have a look what Add-In-Express adds there, to then use it to reference it as FileName for the XLL equivalent.