shdocvw: Add ITaskbarList2 Interface (try 2)

[Michael Stefaniuc]

Hello André,

On 06/20/2011 10:01 PM, André Hentschel wrote:
> I should mention that i never added a interface before, neither one
> that extends an existing one. I want to stub out ITaskbarList3, so i
> thought i should first start with ITaskbarList2 and see what i'm doing
> right or wrong.
this is a waste of time. Go straight for ITaskbarList3 as that inherits
from ITaskbarList2. You would would just duplicate most of the work as
you have to change again all the functions to take a ITaskbarList3
instead of a ITaskbarList2.

> This time i kept the implementation of QueryInterface
> as much as possible.

bye
        michael