Re: About a window with NULL_BRUSH

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Mon, 20 Nov 2006 22:23:01 -0500

Message-ID:

<uUrfaxRDHHA.1220@TK2MSFTNGP04.phx.gbl>

"alanzhao" <alanzhao0128@hotmail.com> wrote in message
news:eqdiRjRDHHA.2176@TK2MSFTNGP04.phx.gbl

   In my code , I created a Window whose background is NULL_BRUSH ,
and it's no menu and title . That is , it is a Transparnt window .
And I created a Timer to updatewindow.When the WM_PAINT message come
, I DrawText on the window.Every time I draw different text on the
window.
   But now , I have a problem.
   The window isn't redraw.The text drawn at last time is'nt
erased.

No, it is erased - with a NULL brush. That's what you asked for, after
all.

You want to give your window a WS_EX_TRANSPARENT style. Better still, on
systems that support it (Win2K and up) make it a layered window (see
WS_EX_LAYERED).
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925