This chapter describes the screen management routines available with DEC C for OpenVMS Systems.
On all OpenVMS systems, the OpenVMS Curses screen management package is supported. This is the same package of routines used by the VAX C Run-Time Library (RTL).
On Alpha systems, for OpenVMS Alpha Version 1.5 or higher, two screen management packages are supported: OpenVMS Curses and a more UNIX compatible package based on the Berkeley Standard Distribution (BSD) Curses software. See Section 6.1 for more information.
Furthermore, beginning with OpenVMS Alpha Version 7.0, the DEC C RTL offers a curses package based on the 4.4BSD Berkeley Software Distribution. Documentation on the 4.4BSD curses package can be found in Screen Updating and Cursor Movement Optimization: A Library Package, by Kenneth C.R.C. Arnold.
The functions and macros in the OpenVMS and BSD-based Curses packages are nearly the same. Most differences between them are called out in this chapter. Otherwise, this chapter makes no distinction between the two Curses packages, and refers to "Curses" or the "Curses functions and macros."