Sorry for the typos, I'm replying from my phone.

On Sunday, June 19, 2016, Aaryaman Vasishta <jem456.vasishta@gmail.com> wrote:

On Sunday, June 19, 2016, Henri Verbeet <hverbeet@gmail.com> wrote:
On 19 June 2016 at 00:29, Aaryaman Vasishta <jem456.vasishta@gmail.com> wrote:
> +�� { &IID_IUnknown,�� &IID_IUnknown, NULL,�� S_OK�� },
Is the NULL "vtable_iid" here intentional?

Yes, it means that it the particular interface hasn't been implemented in QI yet. In this case, IUnknown QI's to frame1in wine,��but in Windows it QI's to something else, possibly IUnknown's own vtable.

Cheers,
Aaryaman