Re: Closing modeless dialogs

From:
"Tom Serface" <tom.nospam@camaswood.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 11 Mar 2008 09:10:37 -0700
Message-ID:
<E448DBF6-55B6-493F-AFEA-F2BF11E5BE6B@microsoft.com>
I typically do not call OnOK for modeless dialogs. Instead I create my own
End() function:

void CStatusDlg::End()
{
     if (m_hWnd)
          DestroyWindow();
}

And I just call that when I want to close it off. I also put this in the
destructor:

CStatusDlg::~CStatusDlg()
{
     if (m_hWnd)
          DestroyWindow();
}

Did you create the dialog with something like:

    dlg.Create(IDD);

Maybe your dialog object is going out of scope since you put it on the stack
and is destroyed before you call your function?

Tom

"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.
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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