HP 3000 Manuals HP 3000 Manuals
Appendix G ANYPARM External Call Feature
Introduction
The HP Business BASIC/XL ANYPARM external feature is used with programs
that were originally written in BASIC/V. Although calls to externals are
easy to code in an HP Business BASIC/XL program, understanding and
writing the externals that use the ANYPARM interface are more difficult
than for normal externals. Therefore, use the ANYPARM external only when
the HP Business BASIC/XL normal external call interface is too
restrictive. In fact, you should rarely have to use this feature. This
appendix is a technical discussion of the ANYPARM feature. It explains
how it works and how it can be used.
This appendix contains the following information:
Table G-1. Information in ANYPARM External Call Feature
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| Section | Information |
| | |
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| | |
| Overview of Calling | This section contains a brief general introduction to the |
| Externals | process of calling externals. |
| | |
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| An Overview of | This section contains an overview of the ANYPARM external. It |
| ANYPARM | explains general considerations when using the ANYPARM external. |
| | |
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| ANYPARM Calls From HP | This section explains the call syntax for two methods of calling |
| Business BASIC/XL | ANYPARM externals. |
| | |
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| Writing ANYPARM | This section contains the requirements for writing the external |
| External Procedures | procedure, as well as the requirements for HP Business |
| | BASIC/XL's data structures. |
| | |
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| Example of a Simple | This section is a simple example external that has an ANYPARM |
| Pascal ANYPARM | formal parameter interface written in Pascal. The HP Business |
| Procedure | BASIC/XL program that calls the external is also included. |
| | |
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| Example of a Simple C | This section is a simple example external that has an ANYPARM |
| ANYPARM Procedure | formal parameter interface written in C. The HP Business |
| | BASIC/XL program that calls that procedure is also included. |
| | |
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| Pascal Data | This section is a program that contains Pascal data structures |
| Structures for | required for writing ANYPARM externals. This provides all the |
| ANYPARM Calls | constant declarations and type definitions that allow you to |
| | manipulate any of the actual parameters passed from an HP |
| | Business BASIC/XL program. |
| | |
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| A Pascal ANYPARM | This section is an example program and a memory display of a |
| Procedure Designed to | call from HP Business BASIC/XL to an external procedure. The |
| Process Any Parameter | example demonstrates how to call an ANYPARM external that is |
| | capable of processing any of HP Business BASIC/XL's data types. |
| | |
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| Differences Relative | This section explains the differences between HP Business |
| to BASIC/V | BASIC/XL and BASIC/V that are relevant to the ANYPARM External. |
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