Re: Closing modeless dialogs

From:
"Mark Salsbery [MVP]" <MarkSalsbery[MVP]@newsgroup.nospam>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 11 Mar 2008 13:10:58 -0700
Message-ID:
<6ECDAC44-6B66-4D3A-B0AB-51B058AC9CDC@microsoft.com>
"Torsten Hensel" <Hensz@expires-31-03-2008.news-group.org> wrote in message
news:1205250766.78@user.newsoffice.de...

Hi!
I created a simple dialog-based application. Then I created a modeless
dialog in MyApp::InitInstance - the dialog object is created on the stack.


The stack object is going out of scope, forcing the destruction of the
window from the destructor.

As mentioned, you need to create it on the heap if you want it to stay in
existence beyond InitInstance().

I disagree with Joe - creating an app's main window is often done in
InitInstance().

Mark

--
Mark Salsbery
Microsoft MVP - Visual C++

Displaying the dialog works (I call Create() first and then
ShowWindow(SW_SHOW)). But when I close the dialog using either
DestroyWindow() or CDialog::OnOK() I get the following warning (and
assertions):
Warning: calling DestroyWindow in CDialog::~CDialog --
OnDestroy or PostNcDestroy in derived class will not be called.
Warning: calling DestroyWindow in CWnd::~CWnd; OnDestroy or PostNcDestroy
in derived class will not be called.

Btw. when I use OnOK I get only two assertions, with DestroyWindow I get
three.

I searched for those warnings in google, and I searched for modeless
dialogs in general. The only thing I found was to implement the
PostNcDestroy function with delete this; But this should only be necessary
when creating the dialog object on the heap...

What can I do to prevent this warning? I don't have any idea!

Best regards,
Torsten

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