Re: Starting and ending a thread in a Dialog application

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Mon, 24 Nov 2008 07:49:14 -0500
Message-ID:
<u7#AOMjTJHA.3520@TK2MSFTNGP06.phx.gbl>
hamishd wrote:

I know i'm doing this wrong.. any advice?

What I want to achieve is this: I have a MFC Dialog application. When
the application is executed, some data is processed, and the
application exits. This can easily be done with no GUI. However, I use
a dialog application as I want the user to be able to stop the
processing at their own wish.

In the OnInitDialog() I start my worker thread. <<prob not the best
way, but it's the only way i know. the thread MUST automatically start
on execution of the application>>.

Once the thread has finished its task, I want to close the dialog and
end everything. The question is.. how?!? I am using EndDialog(), but I
do not think this is the best way?

BOOL CMyAppDlg::OnInitDialog()
{
   ....
   ....
   ....
   SendMessage(UWM_START_THREAD, 0, 0);
   return TRUE;
}

BEGIN_MESSAGE_MAP(CMyAppDlg, CDialog)
    //{{AFX_MSG_MAP(CMyAppDlg)
    ON_MESSAGE(UWM_START_Thread, OnStart)
    //}}AFX_MSG_MAP
END_MESSAGE_MAP()

LRESULT CMyAppDlg::OnStart(WPARAM wp, LPARAM lp)
{
    AfxBeginThread(StartThread, this);

    return 0;
}

UINT StartThread(LPVOID pParam)
{
   //do some data processing here....

   //now finished, so end everything
   pDlg->EndDialog(0);

   return 0;
}


hamishd:

The thread should use PostMessage() to post a custom message to the dialog, and
the handler should call EndDialog().

--
David Wilkinson
Visual C++ MVP

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