Getting Started with DECTPU 2.1 Invoking DECTPU on OpenVMS Systems

Note

When you invoke DECTPU with the /NOSECTION qualifier, DECTPU does not use any binary file to provide an interface. Even the Return and Delete keys are not defined. Use /NOSECTION when you are running a standalone command file or when you are creating a new section file and do not want the procedures, variables, and definitions from an existing section file to be included. See Section 2.6 and Chapter 5 for more information on /NOSECTION.

An initialization file contains commands for a DECTPU-based application. For example, an initialization file for EVE can contain commands that define keys or set margins. Initialization files are easy to create, but they cause DECTPU to start up somewhat more slowly than section and command files do. To invoke an initialization file, use the /INITIALIZATION qualifier. For more information on using initialization files, see Chapter 5.

You can use either a command file or a section file, or both, to customize or extend an existing interface. Generally, you use a command file for minor customization of an interface. Because startup time is faster with a section file, you should use a section file when the customization is lengthy or complex, or when you are creating an interface that is not layered on an existing editor or application. You can use an initialization file only if your application supports the use of such a file.

The source files for EVE are in SYS$EXAMPLES. To see a list of the EVE source files, type the following at the DCL prompt:

$ DIRECTORY SYS$EXAMPLES:EVE$*.TPU

If you cannot find these files on your system, see your system manager.

Chapter 5 describes how to write and process command files and section files.

2.2 Invoking DECTPU from a DCL Command Procedure

There are two reasons that you might want to invoke DECTPU from a command procedure:

•To set up a special environment for interactive editing

•To create a noninteractive, DECTPU-based application The following sections explain how to do this.

2.2.1Setting Up a Special Editing Environment

You can run DECTPU with a special editing environment by writing a DCL command procedure that first establishes the environment that you want and then invokes DECTPU. In such a command procedure, you must define SYS$INPUT to have the same value as SYS$COMMAND because DECTPU signals an error if SYS$INPUT is not defined as the terminal. To prevent such an error, place the following statement in the command procedure setting up the environment:

$ DEFINE/USER SYS$INPUT SYS$COMMAND

Getting Started with DECTPU 2–3

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Compaq AA-PWCBD-TE manual Invoking Dectpu from a DCL Command Procedure, Setting Up a Special Editing Environment
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