comctl32: Make an attempt to update notification handle

Nikolay Sivov nsivov at
Sun Mar 24 22:39:41 CDT 2013

On 3/25/2013 07:34, Dmitry Timoshkov wrote:
> Nikolay Sivov <nsivov at> wrote:
>>>> +    {
>>>> +      HWND parent = GetParent(hwnd);
>>>> +      if (parent) infoPtr->hwndNotify = parent;
>>>> +      return DefWindowProcW(hwnd, uMsg, wParam, lParam);
>>>> +    }
>>> What if an application subclasses tab and doesn't pass WM_WINDOWPOSCHANGING
>>> to the original proc?
>> Then it will fail just like it does currently, and will work for the
>> rest of the applications.
> Is it really supposed to fail?
That's a different problem.
>>>    Why not just call GetParent() every time when a
>>> notification is being sent?
>> Because it won't work if you create a control without WS_CHILD.
> How is that different from the WM_WINDOWPOSCHANGING handler?
How what is different? There's a check for null parent as you can see.

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