public SubHeader(uint offsetSubheader, MBOBuffer bufTable)
{
firstCode = bufTable.GetUshort(offsetSubheader);
entryCount = bufTable.GetUshort(offsetSubheader + 2);
idDelta = bufTable.GetShort (offsetSubheader + 4);
idRangeOffset = bufTable.GetUshort(offsetSubheader + 6);
m_offsetSubHeader = offsetSubheader;
}