The Question is:
How do I communicate detween tow processes on two machines?
The Answer is :
Typically via a network.
Common network communications protocols include clustering, via IP
(TCP, UDP, and other IP-based protocols), via Intra-Cluster
Communications Services (ICC; system services that are part of
OpenVMS itself), and via DECnet.
For some of the many examples, please see the files in TCPIP$EXAMPLES:
(if you have TCP/IP Services installed) and SYS$EXAMPLES:DB*.*.
Please acquire and read the OpenVMS Programming Concepts manual, and
the IP and/or DECnet product documentation. Please see the OpenVMS
FAQ for pointers to on-line versions.