Activator.CreateInstance() works inside VSIDE but not externally

Question

I have a bunch of COM objects which all implement the same interface, and need to create one of them as chosen at runtime from a list of options. Since I know the CLSID for

Answer 1

"Technically speaking adobe supplied and correctly registered the PDF text extraction filter DLL (ACRORDIF.DLL) but it wouldn't be instantiated by any common means, that is either using LoadIFilter API or using direct COM object creation after looking up the filter object CLSID in the registry. Was it broken? No, because somehow windows search could use it!? Some people argued that the filter was dropped in STA threading mode (like it did in the old v6 days) but that isn't corroborated by the ThreadingModel of the filter DLL. Some talked about running it only through a Job object. Adobe support kept themselves tight lipped and were claiming that the restriction was there for our security — ahem." ... "Can you guess how the trick works? They hard coded the names of MS tools like FILTDUMP in the PDF filter ACRORDIF.DLL!!! So when the PDF IFilter object is being instantiated, it checks the calling process name, and if it is one in the "whitelist" it works, otherwise it fakes a problem and E_FAILs. Scandalous. For proof, rename your program to "filtdump.exe" and as if by magic everything works, even plain LoadIFilter without job objects."

Does Adobe reader support PDF text extraction or not?