VC++ how to get EnhMetaFileBits of every word page

CApplication wordApp;
 COleVariant vTrue((short)TRUE), vFalse((short)FALSE), vOpt((long)DISP_E_PARAMNOTFOUND, VT_ERROR);
 CDocuments docxs;
 CDocument0 docx;
 CRange aRange;
 CString out_path=_T("C:\\Users\\Administrator\\Desktop\\test\\");

 docxs.ReleaseDispatch();

 try
 {
 CoInitialize(NULL);
 if(!wordApp.CreateDispatch(_T("Word.Application"),NULL))
 {
 AfxMessageBox(_T(it cant run")
 return ;
 }
 }
 catch(...)
 {
 return ;
 }



 docxs=wordApp.get_Documents();
 COleVariant vFileName(in_path); 
 docx=docxs.Open(vFileName,vFalse,vTrue,vFalse,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt,vOpt); 
 CWindows win=docx.get_Windows();
 CWindow0 window = wordApp.get_ActiveWindow();
 CPane0 pane = window.get_ActivePane();
 CPages pages = pane.get_Pages();
 long index=pages.get_Count();

 for(long i=1;i<=index;i++)
 {

 CPage page=pages.Item(index);（there is a error here,"The requested member of the collection does not exist"）
......

 }