Re: SAFEARRAYs in ATL to VBA

From:
"Igor Tandetnik" <itandetnik@mvps.org>
Newsgroups:
microsoft.public.vc.atl
Date:
Mon, 5 Nov 2007 22:46:13 -0500
Message-ID:
<u6eUVeCIIHA.1168@TK2MSFTNGP02.phx.gbl>
"Constantinos Marinos" <cmarinos@mit.edu> wrote in message
news:Xns99DFDE1AD79F3Costas@216.196.97.131

I would like to be able to modify the size of the SAFEARRAY as well
as its contents.


Then you would deallocate the old array with SafeArrayDestroy, and
allocate a new one with SafeArrayCreate


However, in that case, I would be able to create (with the call to
SafeArrayCreate) an array containing any kind of data (IDispatch * for
example). Is that allowed?


That would be in violation of the contract. Your IDL says
SAFEARRAY(double), right? If you allocate an array of some other type,
most likely you'll get type mismatch error on VB side.

And how would VBA deal with this? Would VBA simply interpret the new
contents as doubles?


Try it and find out, if you are curious. Programming is an experimental
science.
--
With best wishes,
    Igor Tandetnik

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