[m_cocoaNSImage lockFocus];
[nsimage drawAtPoint: NSMakePoint(0,0)
fromRect: NSMakeRect(0.0,0.0,m_selectedBitmap.GetWidth(),m_selectedBitmap.GetHeight())
operation: NSCompositeCopy
fraction: 1.0];
[m_cocoaNSImage unlockFocus];
[m_cocoaNSImage lockFocus];
[nsimage drawAtPoint: NSMakePoint(0,0)
fromRect: NSMakeRect(0.0,0.0,m_selectedBitmap.GetWidth(),m_selectedBitmap.GetHeight())
operation: NSCompositeCopy
fraction: 1.0];
[m_cocoaNSImage unlockFocus];