{
{    The purpose of this request is to deliver message contents to a specified
{ data area and to release the delivered contents.
{
{    NOTE:  If the message identifier is invalid, a system error ('Buffer
{          Manager Caller') will occur.
{
{       NLP$BM_DELIVER_MESSAGE (DATA_AREA, MESSAGE_ID, DATA_LENGTH,
{             BUFFERS_RELEASED)
{
{ DATA_AREA: (input, output)  This parameter specifies a data area to receive
{       the content of the message on input.  On output it describes the data
{       area not filled by the delivered message.
{
{ MESSAGE_ID: (input, output)  This parameter specifies the identifier of the
{       message to be delivered.  If the data area capacity is sufficient to
{       hold the complete message, the message is released.  Otherwise, the
{       undelivered portion is returned.
{
{ DATA_LENGTH: (output)  This parameter specifies the number of bytes moved to
{       the data area.
{
{ BUFFERS_RELEASED: (output)  This parameter specifies the number of buffers
{       released as a result of this request.
{
