Re: Need help resolving modeless dialog issue

On Mon, 30 Jul 2007 13:32:41 -0700, Scoots <linkingfire@xxxxxxx> wrote:

Hi,

I have a weird problem that only shows up in a release build, and not
in debug. I have a modeless dialog I'm launching from a menu. It
opens up fine in debug mode, works great and while it needs tinkering,
it's fine.

I run into problems on a release build, though. The first time I
click to launch the dialog window (which runs this code:)

CPrgEditorDialog* dlg = new CPrgEditorDialog;
dlg->ptrToMain = m_hWnd;
dlg->ShowWindow(SW_SHOW);
*****
You did not actually create a dialog here. You created a new instance of the C++ object,
but not an instance of the dialog itself.

You should do
dlg->Create(CPrgEditorDlg::IDD, this);

Note that by specifying 'this', you make the parent be the current window, so you don't
need ot have a ptrToMain (and if you DID have a ptrToMain, why is it an HWND instead of
being a CWnd * and write
dlg->ptrToMain = this;
since an HWND is not a ptr, and therefore using HN incorrectly is both misleading and a
source of future errors.

In the dialog, if you need to communicate to the window, you can write
GetParent()->SendMessage(...);
instead of
::SendMessage(ptrToMain, ...);
****

The modeless dialog doesn't show up. If I navigate through the menu
and select it again, it opens correctly. Any attempts after that open
a new window on the first try.
*****
You have not shown enough code to make it clear what happens if you call it a second time;
you only showed the code that handles it for the first time. You would need to show all
relevant code for the creation.
****

It's just like that first one gets fried as soon as I open it, but
only in release mode. I'll be happy to tell you more, I know this is
slight information to go on... but I don't know where to even begin
looking on this one.
****
See my essay on Surviving the Release Version in my MVP Tips site.
joe
****

Thanks,
~Scoots
Joseph M. Newcomer [MVP]
email: newcomer@xxxxxxxxxxxx
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm
.

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