wxASSERT_MSG( (size_t)n == m_panes.GetCount(), _T("field number mismatch") );
for ( size_t i = 0; i < m_panes.GetCount(); i++ )
wxASSERT_MSG( (size_t)n == m_panes.GetCount(), _T("field number mismatch") );
for ( size_t i = 0; i < m_panes.GetCount(); i++ )