Low-Level Screen I/O Services APIs
The low-level services are divided into the following functional groups:
- Screen Manipulation and Query APIs, which are used
to query and manipulate the state of the screen.
- Buffer Manipulation and Query APIs, which are used
to create, query, and manipulate input and command buffers used to interact
with the screen.
- Screen Input APIs, which are used to read field
data and other information from the screen.
- Screen Output APIs, which are used to define fields and write data and other information to the screen.
The low-level screen I/O services APIs provide a direct interface to the 5250 data stream commands and user-defined data streams for performing basic screen I/O operations. For detailed information about the results and interactions of these operations, see the following 5250 data stream documentation:
- 5250 Functions Reference, SA21-9247. This manual is not
accessible online, but can be ordered from the
IBM® Publications Center.
- 5494 Remote Control Unit Functions Reference R3.1, SC30-3533-04. This manual can be viewed online through the IBM Publications Center.
For additional information, select one of the following topics:
- Low-Level Services Examples
- Using Low-Level Screen I/O Services APIs, including
- 5250 Data Stream Details, including
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