Overview of the DEC Text Processing Utility

1.2 Description of DECwindows DECTPU

1.2.1 DECwindows DECTPU and DECwindows Features

The DECwindows environment has a number of toolkits and libraries that contain routines for creating and manipulating DECwindows interfaces. DECwindows DECTPU contains a number of built-in procedures that provide access to the routines in the DECwindows libraries and toolkits.

With these procedures, you can create and manipulate various features of a DECwindows interface from within a DECTPU program. In most cases, you can use DECTPU DECwindows built-in procedures without knowing what DECwindows routine a given built-in procedure calls. For a list of the kinds of widgets you can create and manipulate with DECTPU built-in procedures, see Chapter 5.

You cannot directly call DECwindows routines (such as X Toolkit routines) from within a program written in the DECTPU language. To use a DECwindows routine in a DECTPU program, use one or more of the following techniques:

•Use a DECTPU built-in procedure that calls a DECwindows routine. Examples of such DECTPU built-in procedures include the following:

CREATE_WIDGET

DELETE (WIDGET)

MANAGE_WIDGET

REALIZE_WIDGET

SEND_CLIENT_MESSAGE

SET (CLIENT_MESSAGE)

SET (DRM_HIERARCHY)

SET (ICON_NAME)

SET (ICON_PIXMAP)

SET (MAPPED_WHEN_MANAGED)

SET (WIDGET)

SET (WIDGET_CALL_DATA)

SET (WIDGET_CALLBACK)

UNMANAGE_WIDGET

For more information about how to use the DECwindows built-ins in DECTPU, see the individual built-in descriptions in the DEC Text Processing Utility Reference Manual.

•Use a compiled language that follows the OpenVMS calling standard to write a function or a program that calls the desired routine. You can then invoke DECTPU in one of the following ways:

Use the built-in procedure CALL_USER in your DECTPU program when the program is written in a non-DECTPU language. (For more information about using the built-in procedure CALL_USER, see the DEC Text Processing Utility Reference Manual.)

Use the DECTPU callable interface to invoke DECTPU from the program. (For more information about using the DECTPU callable interface, see the OpenVMS Utility Routines Manual.)

Overview of the DEC Text Processing Utility 1–3

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Compaq AA-PWCBD-TE manual Overview of the DEC Text Processing Utility
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