[python-win32] Casting to interface from different typelib?
Mark Hammond
skippy.hammond at gmail.com
Sun Jan 11 23:27:57 CET 2009
On 11/01/2009 5:34 PM, Ben Gordon wrote:
> Mark,
>
> MH> pB = mod.InterfaceB(pA.QueryInterface(IID_B, pythoncom.IID_IDispatch))
>
> Thanks so much for the suggestion. I tried it, but it appears that pA
> does not provide a QueryInterface method.
oops - try pA._oleobj_.QueryInterface(...)
> I'm not sure what magic is involved behind the scenes, but this type of
> cast seems to be comparatively convenient and nearly transparent in
> VBA/VB (VB requires an explicit CType call), without the need to lookup
> CLSIDs/IIDs.
Yeah - its a little tricky to make it seamless in Python, but the code
to CastTo isn't *that* long or hairy, so it should be possible to see
what is happening and why.
Cheers,
Mark
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