COM interfaces and inheritance

[Rob Sykes]

Alan Kennedy <alanmk at hotmail.com> wrote in
news:3DDA31DD.35E676C0 at hotmail.com: 

<snip>

> The first step is to get a handle on the module for your COM
> library, like so
> 
> from win32com.client.gencache     import GetModuleForProgID
> myModule = GetModuleForProgID('your.com.library.name.here')
> 
This was the bit I was missing/didn't know. I'd tried doing a 
regular import of the gen_py'd module, also running it in an
interpreter.


> Each possible interface in that module will have a class to
> represent it. Each of the "constructors" for those classes will
> recognise if you have passed it an instance of an object that
> implements a related interface. If  you have, then it will
> return to you an instance that implements the interface you
> need. 
> 
> So some code might look like this
> 
> objA = createObjA() # Returned object implements interface A
> objB = myModule.IInterface2(objA)
> # Bingo!
> 
> At least, that works for me :-)

And it works for me :-)

Ta muchly

-- 
Rob Sykes 

Born again Bairn                  | 'The despair I can live with.
rob at john-richard dot co dot uk |  It's the hope I can't stand'
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