HOW TO GET A WORKSTATION APPLICATION TO INTERFACE WITH Z/OS

I hope this post saves you some aggravation. If you are creating an application and need to interface with z/OS via TCP/IP, there IS an API for that. The book you want is called "IP Sockets Application Programming Interface Guide and Reference" and can be found here. Note - depending on the age of this post, you may want to find a more recent version of the pub. The link takes you to communication pubs for z/OS v1r12.