AnnSetSecondaryBitmap example for Visual C++ 4.0 and later
long hPushPin;
m_Lead1.AnnSetSecondaryBitmap (hPushPin, m_Lead2.GetBitmap (), FALSE);
m_Lead1.SetAnnUserMode (ANNUSERMODE_RUN);
AfxMessageBox("secondary bitmap set");
m_Lead1.SetBitmap(m_Lead1.AnnGetSecondaryBitmap (hPushPin));