Hi, I have a bho and I need to make sure it only does stuff, such as
hook documentcomplete, when it's loaded into IE.
If I'm watching for my bho handle via sysinternals procexp, I can see
it loaded by many things.

Perforce source control
explorer.exe
iexplor.exe
outlook.exe.

Are there any ms docs about who actually loads bhos?
Additionally, if outlook is loading it, does this mean my doc complete
may actually get called when outlook finishes rendering html email?

My bho is being blamed for slow preview when scrolling though html
emails in outlook 2003, preview mode.
Unregistering seems to alleviate the problem, but as far as I can
tell, the bho is doing nothing with outlook anyway.
Logging shows SetSite is never even get called with outlook,

Thanks