As you did, override OnPrepareDC and use following code.
if (pDC->IsPrinting())
{
CPrintDialog *pPD = pInfo->m_pPD;
DEVMODE *pDM = pPD->GetDevMode();
if (pDM->dmOrientation != DMORIENT_PORTRAIT)
{
pDM->dmOrientation = DMORIENT_PORTRAIT;
pDC->ResetDC(pDM);
}
}
Hope it helps you. Good luck.:-)
