IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
 
 // Create a DC representing the whole screen
 IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
 
 // Create a DC representing the whole screen
     ::GpiSetBackMix(m_hPS, BM_LEAVEALONE);
 } // end of wxScreenDC::wxScreenDC()
 
     ::GpiSetBackMix(m_hPS, BM_LEAVEALONE);
 } // end of wxScreenDC::wxScreenDC()