{
{    The purpose of this request is obtain an image of the first n bytes of a
{ message.  Only bytes of the first buffer of the message are returned.
{
{     NOTE:  The procedure is not for general use.  It is intended for use
{           solely by the module nlm$cc_network_event_manager.
{
{       NLP$BM_GET_MESSAGE_HEADER (MESSAGE, NUMBER_OF_BYTES, HEADER)
{
{ MESSAGE: (input)  This parameter specifies the message.
{
{ NUMBER_OF_BYTES: (input)  This parameter specifies the number of bytes
{       requested.  If the amaount of data in the first message buffer is less
{       than the number of bytes requested then the size of 'header' reflects
{       the number of bytes returned.
{
{ HEADER: (output)  This parameter specifies the message header.
{
