olemsg32 module used in win32com exchange server example?

[Bill Tutt]

> From: Gordon McMillan [mailto:gmcm at hypernet.com]
> Sent: Friday, January 21, 2000 8:16 AM
> To: aahz at netcom.com; python-list at python.org
> Subject: Re: olemsg32 module used in win32com exchange server example?
> 
> 
> Aahz wrote:
> > Grant Edwards <grant at nowhere.> wrote:
> > >In article <38863DB3.7FAEC820 at callware.com>, Ivan Van 
> Laningham wrote:
> > >>
> > >>I suspect that is true, but there's a gotcha.  Unless I'm 
> wrong, both
> > >>NetScape Mail and Outlook use MAPI dll's, but they expect 
> different
> > >>functions to be found there.  So, when I want to use 
> Outlook to retrieve
> > >>mail, I can configure everything else correctly but I 
> have to change the
> > >>MAPI.DLL to the one the Outlook expects or it barfs.  
> Then put it back
> > >>when I want to use NetScape. ...
> > >
> > ><Boggle>
> > 
> > It's even worse than that.  AFAIK, NT *still* only loads 
> one copy of a
> > DLL, so that even if you have DLLs in two different 
> directories, it is
> > impossible simultaneously to run programs that use a 
> same-named DLL if
> > they need even different versions.  
> 
> Wrong about that. Though 2 different versions of a mapi dll 
> loaded at the same time might yield trouble, it's not because 
> you can't load them. I do it all the time with (different) 
> python15.dlls. 
> 

Esp. wrong about that with Windows 2000 and Windows 98.
Win2k and Win98 added features so that you could determine
which specific DLL (even if its a DLL you only create via CoCreateInstance
(aka COM object))
is loaded for any given application.

See the following URLs for more information:
http://msdn.microsoft.com/library/techart/sidebyside.htm
http://msdn.microsoft.com/library/techart/dlldanger1.htm

Bill