[python-win32] Re: CAPICOM on Vista 64

[Roger Upole]

"Mark Hammond" <mhammond at skippinet.com.au> wrote in message
news:01a701c8e6de$e959be00$bc0d3a00$@com.au...
>> I'm using python 2.6b1.amd64 and pywin32-211.win-amd64 on my 64 bit
>> vista system. I am trying to access the CAPICOM COM library through
>> win32com.client. However, every time I try to load it through the
>> Dispatch method I get the following error:
>
> It appears that a 64bit version of that COM object has not been installed.
> On my Vista64 box I see the following:
>
> 32bit version of Python:
>
> | pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, None,
> u'The
> Store object does not represent an opened certificate store.\r\n', None,
> 0,
> -2138570192), None)
>
> (ie, the object is installed - but for whatever reason it failed to be
> created)
>
> While the 64bit version of Python on the same box:
>
> | pywintypes.com_error: (-2147221164, 'Class not registered', None, None)
>
> (ie, object not registered)
>
> Sadly (but for good reason) COM doesn't provide interoperability between
> 64
> and 32 bit versions of COM objects.  Although it does allow both 32 and
> 64bit versions to be registered, this particular COM object doesn't take
> advantage of that.  Also somewhat sadly, Python has explicitly made the
> decision to *not* allow both 32 and 64bit versions to be installed on the
> same machine (although that does work fine once you arrange for them to
> both
> be installed)
>

As far as I can tell, they haven't released a 64-bit version of CAPICOM at
all.

What I've done is to create a COM+ application that runs in its own process
and exports the interfaces provided by CAPICOM.  This is fairly
straightforward using the Component Services snapin for MMC.

           Roger