Micro Focus Mainframe Express™

Host Compatibility Option Technical Guide


Issue 6
June 1999

Copyright © 1999 MERANT International Limited. All rights reserved.
This document and the proprietary marks and names used herein are protected by international law.

MERANT has made every effort to ensure that this guide is correct and accurate but reserves the right to make changes without notice at its sole discretion at any time.

The software described in this document is supplied under a license and may be used or copied only in accordance with the terms of such license, and in particular any warranty of fitness of MERANT software products for any particular purpose is expressly excluded and in no event will MERANT be liable for any consequential losses.

Micro Focus® and Visual® are registered trademarks, and MERANT™, CICS Option™, Host Compatibility Option™, IMS Option™ and Mainframe Express™ are trademarks, of MERANT International Limited

DEC® is a registered trademark of Digital Equipment Corporation

DB2® and IBM® are registered trademarks, and CICS™, DATABASE 2™, DRDA™ and MVS™ are trademarks, of International Business Machines

Lotus® is a registered trademark of Lotus Development Corporation

Microsoft® and Windows® are registered trademarks, and NT™ is a trademark, of Microsoft Corporation

NetWare® is a registered trademark of Novell, Inc

Snapshot® is a registered trademark of Kinemetrics, Inc

Printed in U.S.A.


This book describes the functionality provided by Mainframe Express Host Compatibility Option running under Windows NT or Windows 95.


This manual is intended for you, if you need to develop DB2/MVS or DB2/VM applications using personal computers or workstations. It is also intended for current users of DB2 Universal Database, DB2/NT or DB2/WIN95. It is assumed that you have a general understanding of the COBOL language, and in particular of DB2/MVS or DB2/VM, and that you have access to the related publications described below.

Related publications

Notations and Conventions

Enter refers to the carriage return or Enter key. Where commands to be typed are shown, the Enter key is not explicitly shown; it is treated as implicit that Enter must be pressed at the end of the line.

Hexadecimal numbers are enclosed in quotation marks and preceded by a lower-case "x" or "h"; for example, x"9D", h"03FF". The "x" is used when the hexadecimal number represents a character string; the "h" when it represents a numerical value.

PIC X is used with the COMP-X and COMP-5 data types rather than PIC 99. Unlike PIC 99, PIC X shows the length of the data item and so demonstrates more clearly the use of COMP-X, which is to define a binary item of the specified number of bytes.

Keytops and menu choices are emboldened within the text.

Side headings are used to indicate environment specific information. For example:

DB2 Universal Database
DB2 Universal Database information. HCO can be used with DB2 Universal Database, DB2/NT V2.1, and DB2/WIN95 V2.1. This manual refers to the current version of the product except where noted.