CPropertySheet *CPropertyPage::GetParentSheet()

{

     for (CWnd *pWnd = GetParent(); pWnd != NULL; pWnd = pWnd->GetParent())

     {

          CPropertySheet *pSheet = DYNAMIC_DOWNCAST(CPropertySheet, pWnd);

          if (pSheet != NULL)

          {

               return pSheet;

          }

     }

     ASSERT(FALSE); // Could not find the CPropertySheet

     return NULL;

}