Re: How to current close window while messages still in queue

Hi All,

Here is my scenario:

I have an MFC application. In one of the dialogs, I have a worker thread.

Here's how I start the thread:

 m_pThread = AfxBeginThread((AFX_THREADPROC)LoadThread, this, 0, 0,
CREATE_SUSPENDED);

 m_pThread->m_bAutoDelete = FALSE;
 m_pThread->ResumeThread();

The thread reads some rows from a database (SELECT * ..), and then
iterates through the result set and sends the data rows one by one to the
GUI to update a GUI control:

 for (int i = 0; i <= iUpperBound && (WaitForSingleObject(m_hQuitEvent, 0)
== WAIT_TIMEOUT); ++i)
 {
         /../
         // Construct data, etc...
         CData* pData = new CData; // pseudocode
         PostMessage(UpdateMessage, (WPARAM)pData, ... ) // Update the GUI
and delete pData
  }

After the for loop is over, the thread function just finishes and this
thread ends. The m_hQuitEvent is there so that I can set it if I want to
abort the processing.

Here is how the message handler looks like:

LRESULT CWhateverDialog::OnUpdateMessage(WPARAM wParam, ...)
{
 CData* pData = (CData*)wParam;
 // update GUI control w/ pData information

 delete pData;
  return 0;
}

The problem is that when I close the dialog, even though I wait for the
thread to complete (WaitForSingleObject on its handle -
CWinThread::m_hThread), there are still some messages in the message queue
that are not yet processed and so I end up having some memory leaks
(because the handler never gets a chance to be called to de-allocate the
objects allocated and postmessage'ed to the GUI.)

What is the correct way to handle this situation ?