Re: How to do VB's DoEvent in VC win32?

From:

"Arnaud Debaene" <adebaene@club-internet.fr>

Newsgroups:

microsoft.public.vc.language

Date:

Sat, 17 Jun 2006 00:11:46 +0200

Message-ID:

<uDd3VHZkGHA.1936@TK2MSFTNGP04.phx.gbl>

"William DePalo [MVP VC++]" <willd.no.spam@mvps.org> a ?crit dans le message
de news: uTbp5CXkGHA.1264@TK2MSFTNGP05.phx.gbl...

<adebaene@club-internet.fr> wrote in message
news:1150467218.648440.31590@r2g2000cwb.googlegroups.com...

Igor Tandetnik a ?crit :
"Boki" <bokiteam@ms21.hinet.net> wrote in message
news:1150422967.816286.299240@i40g2000cwc.googlegroups.com

I have a for loop,

In VB version, I can do like this:

1. text1.refresh
2. DoEvents

but in VC win32, how to do that?

MSG msg;
while (PeekMessage(&msg, 0, 0, 0, 0, PM_REMOVE)) {
    if (msg.message == WM_QUIT) {
        PostQuitMessage(msg.wParam);
        break;
    }
    TranslateMessage(&msg);
    DispatchMessage(&msg);
}

Anyway, it is generally considered a bad practice to work that way
(either with VB' DoEvents, either with an explicit message pump in
C++). You should Invalidate the window instead.

Invalidating the window only insures that the window will sometime later
receive a WM_PAINT message. If the UI thread is off doing some lengthy
chore (I'm not saying that's a good idea, btw)

You said it ;-)

then a loop like Igor's insures that the window does npt appear hung to
the user.

Yep, but mixing UI and background processing is always a bad idea... The
good solution is of course a worker thread.

Arnaud
MVP - VC