
{
{     The purpose of this request is to gain exclusive access to a connection.
{  Assuming the connection exists, if excluisve access cannot be acquired,
{  control is returned immediately to the requestor.
{
{      If the access is acquired, this request must be symmetrical with a
{  subsequent release exclusive access request.
{
{      ** THIS REQUEST IS NOT TO BE USED BY APPLICATION LAYERS. **
{
{       NLP$CL_GET_EXCLUSIVE_ACCESS (CONNECTION_ID, SYSTEM_INPUT_TASK,
{           CONNECTION_EXISTS, ACCESS_GAINED,
{           CL_CONNECTION)
{
{  CONNECTION_ID: (input) This parameter specifies the identifier
{       of connection to be accessed.
{
{  SYSTEM_INPUT_TASK: (input) This parameter specifies if the requesting task is
{       the system input task.  If the requesting task is the system input task
{       and exclusive access cannot be acquired, the task is notified when the
{       the connection becomes available for access.
{
{  CONNECTION_EXISTS: (output) This parameter specifies whether the connection
{       exists.
{
{  ACCESS_GAINED: (output) This parameter specifies whether the exclusive
{       access was gained.
{
{  CONNECTION: (output) This parameter specifies the accessed connection.
{
