C / C++ / MFC

void CMainFrame::OnClose()
{
#ifdef _USE_CMC6INVOICE_THREAD_
	
	POSITION pos, posView;
		
	pos = theApp.m_pCmc6InvoiceDocTemplate->GetFirstDocPosition();
	while(pos != NULL)
	{
		CDocument *pDoc = theApp.m_pCmc6InvoiceDocTemplate->GetNextDoc(pos);
		if(pDoc!= NULL)
		{
			posView = pDoc->GetFirstViewPosition();
			while(posView != NULL)
			{
				CView * pView = pDoc->GetNextView(posView);
				if(pView->IsKindOf(RUNTIME_CLASS(CCMC6InvoiceView)))
				{
					CCMC6InvoiceView * pInv = (CCMC6InvoiceView *) pView;
					if(pInv->m_clsInvoice->m_pThread != NULL)
					{
						if(pInv->m_clsInvoice->m_pThread->GetActivityStatus() == THREAD_NOTPREPARED_TO_TERMINATE) 
						{
							TRACE("Mainframe: OnClose() ->CMC6InvoiceView Thread Busy, Can't close yet...\n");
							Sleep(200);
							PostMessage(WM_CLOSE); 
							return;
						}
					}
				}
			}
		}
	}
#endif
#ifdef _USE_BACKGROUND_THREAD_
	DWORD dwExitCode;
	m_pBackThread->Stop(dwExitCode, 0);
	if(m_pBackThread->GetActivityStatus() == THREAD_NOTPREPARED_TO_TERMINATE) 
	{
		TRACE("Mainframe: OnClose() ->BackProcess Thread Busy, Can't close yet...\n");
		Sleep(200);
		PostMessage(WM_CLOSE); 
	}
	else 
	{ 
		TRACE("Mainframe: OnClose() ->Can close now\n");
		m_pBackThread->Stop(dwExitCode);
		
		// Save the current state for tool bars and menus.
		SaveCommandBars(_T("CommandBars"));
		// Save the current state for docking panes.
		CXTPDockingPaneLayout layoutNormal(&m_paneManager);
		m_paneManager.GetLayout(&layoutNormal);
		layoutNormal.Save(_T("NormalLayout"));
		
		CMDIFrameWnd::OnClose();
   }
#else
	// Save the current state for tool bars and menus.
	SaveCommandBars(_T("CommandBars"));
	// Save the current state for docking panes.
	CXTPDockingPaneLayout layoutNormal(&m_paneManager);
	m_paneManager.GetLayout(&layoutNormal);
	layoutNormal.Save(_T("NormalLayout"));

	CMDIFrameWnd::OnClose();
#endif
}