Newsgroups: comp.windows.ms.programmer
Path: utzoo!utgpu!watserv1!watmath!hyper.hyper.com!bonneau
From: bonneau@hyper.hyper.com (Paul Bonneau)
Subject: Re: Strange things about PeekMessage ...
Message-ID: <1991Jun28.182028.6668@hyper.hyper.com>
Reply-To: bonneau@hyper.UUCP (Paul Bonneau,,)
Organization: HyperCube Inc.
References: <1991Jun26.120949.2873@informatik.uni-erlangen.de>
Date: Fri, 28 Jun 1991 18:20:28 GMT

In article <1991Jun26.120949.2873@informatik.uni-erlangen.de> testurm@immd4.informatik.uni-erlangen.de (Torsten Sturm) writes:
>Hi, i've got a problem about PeekMessage :
>
>(I used PeekMessage in a normal while-look a lot, so I
> thought I know all about it ???)
>
>What I want to do is something like this :
>
>for(......)
>{
>/* see, if other apps wish to do something and "eat" all mesg. for this
>   appl. */
> PeekMessage(&msg,hWnd,0,0,PM_REMOVE);
>
>.... do some calculating stuff (no SDK calls)....
>}
>
>
>The result is, that only messages, which are directly sent to other
>window procedures come thru to other apps(I can see this with clock.exe
>or cpuuse.exe from cica), such as WM_PAINT or WM_TIMER.
>But I can't for instance click upon and activate another application.
>
I would guess that by eating all messages for the apo in
question, that you are disabling the process whereby windows
activate another application.  Perhaps the lack of response
to the WM_NCHITTEST message is causing the problem.  To get
more of a feeling for the problem, try using spy on the other
app you are clicking on and record the messages when the
initial conditions are: (ie before you click on the other
app)

	a) another "normal" app is active (notepad or
	   something like that, and
	b) your app is active.

Hope this helps.

cheers - Paul Bonneau.