{
{    The purpose of this request is to obtain the length (in bytes) of a
{ message and the buffer resources consumed by the message.
{
{    NOTE:  If the message identifier is invalid, a system error ('Buffer
{          Manager Caller') will occur.
{
{       NLP$BM_GET_MESSAGE_RESOURCES (MESSAGE_ID, MESSAGE_LENGTH,
{             NUMBER_OF_BUFFERS)
{
{ MESSAGE_ID: (input)  This parameter specifies the identifier of the message
{       whose length is to be returned.
{
{ MESSAGE_LENGTH: (output)  This parameter specifies the length of the message.
{
{ NUMBER_OF_BUFFERS: (output)  This parameter specifies the number of buffers
{       consumed by the message.
{
