{
{    The purpose of this request is to obtain an image of the first n bytes of
{ a received message.  Only bytes of the first buffer of the message are
{ returned.
{
{     NOTE:  The procedure is not a general purpose function.  The procedure is
{           intended for use solely by the NAM/VE monitor mode module.
{
{       NLP$BM_GET_MESSAGE_CONTENTS (RECEIVED_MESSAGE, NUMBER_OF_BYTES,
{             CONTENTS)
{
{ RECEIVED_MESSAGE: (input)  This parameter specifies the message.
{
{ NUMBER_OF_BYTES: (input)  This parameter specifies the number of bytes
{       requested.  If the amount of data in the first message buffer is less
{       than the number of bytes requested then the size of 'contents' reflects
{       the number of bytes returned.
{
{ CONTENTS: (output)  This parameter specifies the message contents.
{
