I'm implementing an ATL com class where the client will be Internet Explorer
(I'm creating a Browser Helper Object).  However, I have had the hardest
time trying to communicate between instances of the BHO.  I have tried
CMemfile (too complicated) and NamedObjectFactory (a custom class factory
that stores references to each instance, but, IE gives a access privilege
exception).  Does anyone know of a way to get instances of an atl com class
to communicate (possibly call functions and send data from one instance to
another).  I have tried a variety of hacks (attempting to store each
getclassobject result object, but, this also gives access exceptions).
However, I am thinking that there must be a tried and true waying of
communicating between instances that I am not realizing.  Currently I am
attempting to use callback interfaces, however, how do you make a class call
back itself?  I have probably spent way too much time looking at a small
picture (the NamedObject Factory suggested by Jeff Prosise seemed a keen
solution--I did get my BHO to load, but, IE would promptly give an access
violation).  Any insight would be greatly appreciated.