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