MFC获取纸张大小

BOOL CPrintView::GetPageSize(CSize &nRetVal)  // CPrintView 是自己创建的类

      {

         PRINTDLG FAR * pPrintDlg = new PRINTDLG;

         BOOL bRet = FALSE;

 

      // Get the current printer's settings.

 

         if(AfxGetApp()->GetPrinterDeviceDefaults(pPrintDlg))

         {

 

      // Get pointers to the two setting structures.

 

            DEVNAMES FAR *lpDevNames =

            (DEVNAMES FAR *)::GlobalLock(pPrintDlg->hDevNames);

 

            DEVMODE FAR *lpDevMode =

            (DEVMODE FAR *)::GlobalLock(pPrintDlg->hDevMode);

 

      // Get the specific driver information.

 

            CString szDriver((LPTSTR)lpDevNames +

                                 lpDevNames->wDriverOffset);

            CString szDevice((LPTSTR)lpDevNames +

                                 lpDevNames->wDeviceOffset);

            CString szOutput((LPTSTR)lpDevNames +

                                 lpDevNames->wOutputOffset);

 

      // Create a CDC object according to the current settings.

 

            CDC pDC;

            pDC.CreateDC(szDriver, szDevice, szOutput, lpDevMode);

 

      // Query this CDC object for the width and height of the current

      // page.

 

            /*static int*/ nRetVal.cx = pDC.GetDeviceCaps(HORZSIZE);

           /* static int*/ nRetVal.cy = pDC.GetDeviceCaps(VERTSIZE);

 

      // Get rid of the CDC object.

 

            pDC.DeleteDC();

 

      // Unlock the pointers to the setting structures.

 

            ::GlobalUnlock(pPrintDlg->hDevNames);

            ::GlobalUnlock(pPrintDlg->hDevMode);

 

          bRet = TRUE;

         }

       delete pPrintDlg;

       return bRet;

   }