继承类自定义函数以修改打印方向debug出错release正常

[waitlife]

原类中的函数是这样的：

void CBCGPGridCtrl::Print ()
{
	// Printing without the Document/View framework
	ASSERT_VALID(this);

	CDC dc;
	CPrintDialog printDlg(FALSE);
	 
	if (printDlg.DoModal() == IDCANCEL)
		return;
	
	dc.Attach(printDlg.GetPrinterDC());
	dc.m_bPrinting = TRUE;

	CString strTitle;
	strTitle.LoadString(AFX_IDS_APP_TITLE);

	DOCINFO di;
	::ZeroMemory (&di, sizeof (DOCINFO));
	di.cbSize = sizeof (DOCINFO);
	di.lpszDocName = strTitle;

	BOOL bPrintingOK = dc.StartDoc(&di);

	m_bIsPrinting = TRUE;
	m_pPrintDC = &dc;

	CPrintInfo printInfo;
	printInfo.m_rectDraw.SetRect(0,0,
		dc.GetDeviceCaps(HORZRES),
		dc.GetDeviceCaps(VERTRES));

	// -----------------------------------------
	// Prepare page for printing, calc page size
	// -----------------------------------------
	int nFirstItem = 0;// By default print all grid items
	int nLastItem = GetTotalItems () - 1;// from first row to the last
	OnPreparePrintPages (&printInfo, nFirstItem, nLastItem);

	OnBeginPrinting(&dc, &printInfo);

	// ---------------
	// Set up margins:
	// ---------------
	CRect rectMargins = OnGetPageMargins (&dc, &printInfo);
	printInfo.m_rectDraw.DeflateRect (&rectMargins);

	int nPagesCount = OnCalcPrintPages (&dc, &printInfo);
	printInfo.SetMaxPage (nPagesCount);

	CRect rectDraw = printInfo.m_rectDraw;

	for (printInfo.m_nCurPage = printInfo.GetMinPage(); printInfo.m_nCurPage <= printInfo.GetMaxPage() && bPrintingOK; printInfo.m_nCurPage++)
	{
		printInfo.m_rectDraw = rectDraw;

		dc.StartPage();

		OnPrint(&dc, &printInfo);
		bPrintingOK = (dc.EndPage() > 0);
	}
	OnEndPrinting(&dc, &printInfo);

	if (bPrintingOK)
		dc.EndDoc();
	else
		dc.AbortDoc();

	m_bIsPrinting = FALSE;
	m_pPrintDC = NULL;

	dc.DeleteDC();

	AdjustLayout ();
}

继承原类的新函数是这样的：

class CBCGPGridCtrlEx : public CBCGPGridCtrl
{
public:
	void CBCGPGridCtrl::Print ()
	{
		// Printing without the Document/View framework
		ASSERT_VALID(this);

		PRINTDLG pd;
		LPDEVMODE lpDevMode;

		CDC dc;
		CPrintDialog printDlg(FALSE);
	 
		pd.lStructSize = (DWORD)sizeof(PRINTDLG);
		if(AfxGetApp()->GetPrinterDeviceDefaults(&pd))
		{
			lpDevMode = (LPDEVMODE)GlobalLock(pd.hDevMode);
			if(lpDevMode)
			{
				lpDevMode->dmPaperSize = DMPAPER_A4;
				lpDevMode->dmOrientation = dmOrientation;
			}
			GlobalUnlock(pd.hDevMode);
		}
		printDlg.m_pd.hDevMode = pd.hDevMode;

		if (printDlg.DoModal() == IDCANCEL)
			return;
	
		dc.Attach(printDlg.GetPrinterDC());
		dc.m_bPrinting = TRUE;

		CString strTitle;
		strTitle.LoadString(AFX_IDS_APP_TITLE);

		DOCINFO di;
		::ZeroMemory (&di, sizeof (DOCINFO));
		di.cbSize = sizeof (DOCINFO);
		di.lpszDocName = strTitle;

		BOOL bPrintingOK = dc.StartDoc(&di);

		m_bIsPrinting = TRUE;
		m_pPrintDC = &dc;

		CPrintInfo printInfo;
		printInfo.m_rectDraw.SetRect(0,0,
			dc.GetDeviceCaps(HORZRES),
			dc.GetDeviceCaps(VERTRES));

		// -----------------------------------------
		// Prepare page for printing, calc page size
		// -----------------------------------------
		int nFirstItem = 0;// By default print all grid items
		int nLastItem = GetTotalItems () - 1;// from first row to the last
		OnPreparePrintPages (&printInfo, nFirstItem, nLastItem);

		OnBeginPrinting(&dc, &printInfo);

		// ---------------
		// Set up margins:
		// ---------------
		CRect rectMargins = OnGetPageMargins (&dc, &printInfo);
		printInfo.m_rectDraw.DeflateRect (&rectMargins);

		int nPagesCount = OnCalcPrintPages (&dc, &printInfo);
		printInfo.SetMaxPage (nPagesCount);

		CRect rectDraw = printInfo.m_rectDraw;

		for (printInfo.m_nCurPage = printInfo.GetMinPage(); printInfo.m_nCurPage <= printInfo.GetMaxPage() && bPrintingOK; printInfo.m_nCurPage++)
		{
			printInfo.m_rectDraw = rectDraw;

			dc.StartPage();

			OnPrint(&dc, &printInfo);
			bPrintingOK = (dc.EndPage() > 0);
		}
		OnEndPrinting(&dc, &printInfo);

		if (bPrintingOK)
			dc.EndDoc();
		else
			dc.AbortDoc();

		m_bIsPrinting = FALSE;
		m_pPrintDC = NULL;

		dc.DeleteDC();

		AdjustLayout ();
	}
}

因为原来的类CBCGPGridCtrl::Print()函数不支持打印方向控制，所以自己继承这个类然后重写打印函数，可通过传入参数以实现打印方向控制，现在问题是调用时都没有问题，但是在DEBUG模式退出程序后，会出现调试错误，
函数：void AFXAPI AfxGlobalFree(HGLOBAL hGlobal)，中断的行是ASSERT(GlobalFlags(hGlobal) != GMEM_INVALID_HANDLE);
如果我不添加修改打印方向的那段代码，都没有任何问题，估计是修改打印方向后，有内存没有正确释放，请各位高手帮忙看看该怎么改这段代码，谢谢！

[waitlife]

请大家帮忙，谢谢！

[waitlife]

请帮忙呀，谢谢

[waitlife]

没人会，还是分太少？

[srvsw]

改成这样：

	void Print()
	{
		// Printing without the Document/View framework
		ASSERT_VALID(this);


		CDC dc;
		CPrintDialog printDlg(FALSE);

		if (printDlg.DoModal() == IDCANCEL)
			return;

		dc.Attach(printDlg.GetPrinterDC());
		dc.m_bPrinting = TRUE;

		// 打印方向调节(直接更改设备环境描述,有待评价)
		PRINTDLG pd;
		LPDEVMODE lpDevMode;
		pd.lStructSize = (DWORD)sizeof(PRINTDLG);
		BOOL bRet = AfxGetApp()->GetPrinterDeviceDefaults(&pd);
		if(bRet)
		{
			//DEVMODE FAR *pDevMode = (DEVMODE FAR *)::GlobalLock(pd.hDevMode);
			lpDevMode = (LPDEVMODE)::GlobalLock(pd.hDevMode);
			if(lpDevMode)
			{
				lpDevMode->dmPaperSize = DMPAPER_A4;
				lpDevMode->dmOrientation = m_dmOrientation;
				dc.ResetDC(lpDevMode);
			}
			::GlobalUnlock(pd.hDevMode);
		}