Dynamically Instantiated ActiveX in DLL

[LordO...@googlemail.com]

(Apologies for crossposting; please direct replies to:
comp.os.ms-windows.programmer.controls)

I have a legacy Win32 project which needs to make use of various
ActiveX controls. Instances of these controls will be dynamically
created by worker threads as necessary. I'd like to package all
ActiveX related code in a DLL to simplify management distribution.

I've tried sticking MFC code in a DLL without any luck and I've also
tried using CoCreateInstance(...) but so far have been unable to get
hold of the interface I want.

I would be grateful if someone could advise me of a sensible approach
to the problem and/or any learning resources that deal specifically
with this sort of issue.

Thanks in advance for any (polite) suggestions :)