Re: CDialog::DoModal in MFC extension DLL

From:

Scot T Brennecke <ScotB@Spamhater.MVPs.org>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 16 Jun 2009 01:34:16 -0500

Message-ID:

<uP$q5xk7JHA.1564@TK2MSFTNGP06.phx.gbl>

Markus E?mayr wrote:

"Scot T Brennecke" <ScotB@Spamhater.MVPs.org> schrieb im Newsbeitrag
news:OwsZQak7JHA.1424@TK2MSFTNGP02.phx.gbl...

Markus E?mayr wrote:

Hello,

I created an MFC extension DLL which is called from a MFC "host
application".
Both dynamically linked agianst the MFC library.

In my DLL, I created a dialog class derived from CDialog.

Through an exported function (plain extern"C"), the host application
opens the dialog in modal state, so internally, CDialog::DoModal is
called.

My dialog class has a PreTranslateMessage method in it, but for any
reason it isn't executed.
Also the navigation in the dialog using Tab or the arrow keys doesn't
work.
Using the dialog with the mouse works.

Can you give me any hint, what I may miss here?

Thanks very much!
Max

Markus,
Are you invoking your dialog (via the exported function) from the main UI
thread of your application? The symptoms you describe sound to me like
perhaps you called it from a non-UI thread.

Scot

Scot,

thanks for the hint.
I verified this.
The application in it's simpliest form only has one thread, but the dialog
doesn't work.
Do you have any other ideas?

Thanks very very much!
Max

You never mentioned which version of VC++ and MFC you are using. The
calling of PreTranslateMessage in CDialogs was not part of some older
MFC versions. Do you see the code going through the message "pump" loop
and skipping over the call to your method?