Re: MFC and threads

// PostMessage Handler for pause message
LRESULT CMainGui::OnPause(WPARAM w,LPARAM p)
{

      Dummy dlg;

    // Create an instance of message window
    dlg.Create(IDD_DUMMY_DIALOG);

    // display the window to display the message, Hello There!, in Edit
control
    dlg.ShowWindow(SW_SHOW);

       // now window appears with Resume button on bottom-so far so
good
      return 0;

}

// Worker Thread Code
LRESULT CMainGuiDlg::WorkerThread(WPARAM , LPARAM)
{
      // Executes code below--everything is good

       // Some decision making happens and this worker thread code
must pause!

    // pause defined as BOOL in CMAINGui header file
       pause = TRUE;

       // hEvent defined to be of HANDLE datatype in CMainGuiDlg
header file
      hEvent = CreateEvent(0, TRUE, TRUE, "MyEvent");

      // i check all functions to see if they were successful which
they are(code not listed here)

       ResetEvent(hEvent); // set the event state to non-signaled

    // OnPause is the message handler ^above^ for UWM_PAUSE message
      PostMessage(UWM_PAUSE, 0, 0);

      while ( running && paused )
        {
                if (paused)
                {
                        switch(::WaitForSingleObject(hEvent, 1000))
                        {
                        case WAIT_OBJECT_0:
                                break;
                        case WAIT_TIMEOUT:
                                continue;
                        }
                }
        }

    // Upon clicking Resume in new dialog window execution must start
here!

     PostMessage(UWM_STATUS, 0, "Resuming...");
      ....
      ....
      return 0; // End of Worker thread code
}

void DUMMY::OnResume()
{
        // TODO: Add your control notification handler code here
        CMainGuiDlg dlg; << Primary window which launched Dummy dialog
Window-i create this data type
                            so i can acess its member variables,
namely, pause and hEvent

        dlg.pause = FALSE; << paused defined in CMainGuiDlg as
BOOL. Since user read the message, user
                wants to resume the execution of program so pause is set to FALSE
now.

        // sets the state of the specified event object to signaled.

        if ( ! ::SetEvent(dlg.hEvent) ) // The event signal is being
processed inside that while loop above
        {
                AfxMessageBox("SetEvent not successful");
        }

        // User is done reading the message-Close the window
   EndDialog(0);

}