Re: [perl-win32-gui-users] HWND_MESSAGE on Win98

[Jan D. <ja...@ac...>]

On Sun, 29 Jul 2007, Robert May wrote:
>  On 29/07/07, Jan Dubois <ja...@ac...> wrote:
> > PS: Please let me know if you happen to know a mechanism to create a
> >     message-only window on 98/NT (a window that is not top-level and
> >     will not receive broadcast messages). If this were possible,
> >     then we could get rid of PostThreadMessage() completely.
>
> I can't speak for WinNT, as I don't have it available, but on Win98,
> using HWD_MESSAGE as the parent window to CreateWindowEx() appears to
> work fine (despite what MSDN says). Using it I end up with a window
> that is a child of a hidden system window. The window is not top
> level, not visible, and I can't make it receive a broadcast message.

I've seen at least anecdotal evidence that using HWND_MESSAGE on 98 might
be somewhat dangerous:

    http://www.virtualdub.org/blog/pivot/entry.php?id=153

So I'm not sure if we want to ignore MSDN on this point.

Cheers,
-Jan