The Miscellaneous APIs are APIs that do not logically fall in a specific part of the API Reference Manual. They perform a variety of functions on the OS/400, including processing open lists.
Retrieve Data (QPARTVDA)
retrieves up to 1KB of user data, which was passed to this system
with the Start Pass-through (QPASTRPT) API.
Start Pass-Through (QPASTRPT)
starts a 5250 pass-through session and optionally passes up to 1KB
of user data from the source system to the target system. This
data can be accessed on the target system with the Retrieve Data
(QPARTVDA) API.