Re: Stack around the variable 'v' was corrupted

"Igor Tandetnik" <>
Mon, 16 Mar 2009 23:56:37 -0400
"Jeffrey Walton" <> wrote in message

CComPtr<Commands> pCommands;
CComPtr<IEnumVARIANT> pEnum;

hr = pCommands->_NewEnum( (IUnknown **)&pEnum );

This is effectively a downcast. Don't do this. Get an honest IUnknown*
pointer from _NewEnum, then QueryInterface from it to IEnumVARIANT.

ULONG fetched;
for( INT i = 1; i <= count; i++ )
   CComVariant v;

   hr = pEnum->Next( i, &v, &fetched );

The first parameter of IEnumXXX::Next determines how many elements you
request in a single call, not an index of the element as you seem to
believe. So on the second iteration you ask for two elements, but you
only provide space for one.
With best wishes,
    Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925

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