High-Level Screen Management Intrinsic Library Reference Manual (32424-90002)

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Chapter 2 Screen Management Intrinsics
This chapter provides comprehensive information about the Hi-Li
intrinsics. If you have never used the screen management facility, read
this chapter before you begin using Hi-Li intrinsics to code your
application.
The topics in this chapter include:
* The basic structure of Hi-Li intrinsics and how they are used
* The way Hi-Li uses the Application-ready Buffer (ARB)
* The languages that Hi-Li supports
* The data types and structures that Hi-Li uses
* The rules for using Hi-Li
Hi-Li Intrinsics
The HP screen management facility comprises three core intrinsics,
HPDSEND, HPDREAD, and HPDPROMPT. They provide the basic functions needed
for the exchange of data between the terminal and your application.
These core intrinsics are supported by the HPDOPENFORMS, HPDCLOSEFORMS,
HPDENABLETERM, and HPDDISABLETERM intrinsics. They perform housekeep-
ing
functions such as opening and closing forms files. The remaining
intrinsics perform more specialized functions that your application may
require, such as configuring parts of the execution environment. Figure
2-1 shows the relationships among the intrinsics.
Figure 2-1. Core and Supporting Intrinsics