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OnPaint()
{
CPaintDC dc(this);
CDC memDC;
CBitmap bmBkgnd;
bmBkgnd.Attach( m_Bkgnd );
memDC.CreateCompatibleDC(&dc);
CBitmap *pOldBm = memDC.SelectObject(&bmBkgnd);
BITMAP bm;
bmBkgnd.GetObject(sizeof(bm), &bm);
dc.BitBlt(0, 0, bm.bmWidth, bm.bmHeight, &memDC,0,0,SRCCOPY );
memDC.SelectObject( pOldBm );
bmBkgnd.Detach();
CDialog::OnPaint();
}