Re: Floating window beside the main app window

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 29 Jun 2007 08:48:20 -0400

Message-ID:

<uhOvKzkuHHA.3796@TK2MSFTNGP02.phx.gbl>

"Victor" <big.boss@chefmail.de> wrote in message
news:1183120882.243954.13010@q75g2000hsh.googlegroups.com

The created window does not get shown until a worker thread tells it
to do so somewhen by means of ShowWindow(TRUE). Well, then it
obediently appears on the screen - but the system gets overloaded at
the same moment and stays so till the window disappears through
invoking ShowWindow(FALSE) by the worker thread.
I checked the reason and found that the floating window receives en
masse messages WM_PAINT - several hundreds a second. Gradually
modifying the window proc I made it to contain only the following
code :

case WM_PAINT :
return 0;

You must call BeginPaint and EndPaint in response to WM_PAINT.
Otherwise, the window is still marked as invalid, and the system
generates another WM_PAINT message to get it to repaint itself. By
calling BeginPaint, you mark the window as valid.
--
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