COM, Registry, and Events for HP OpenVMS Developer's Guide

This document is a developer's guide for COM, Registry, and Events on HP OpenVMS Alpha systems (Version 1.4, January 2005), designed to help developers create applications that interoperate between OpenVMS (v7.3-1+) and Windows (NT 4.0 SP5+ or 2000 SP4+) environments. It assumes prior familiarity with object-oriented concepts, COM, and Windows Registry.

Key areas covered include:

• Component Object Module (COM) for OpenVMS: Details HP's implementation of Microsoft's COM (including DCOM and OLE) on OpenVMS. It guides on developing new COM applications, encapsulating existing OpenVMS applications, and covers installation, configuration, security (NTLM authentication, Windows credentials), and development tools (MIDL compiler, Active Template Library, DLL surrogates, IEEE floating-point support).
• OpenVMS Registry: Explains the system-wide hierarchical database on OpenVMS that mirrors the Windows Registry, used by COM applications for configuration, startup, and security settings. It describes concepts like keys, subkeys, and values, OpenVMS and Windows security models for access, and server management utilities for backup, restore, and quota management.
• OpenVMS Events: Discusses Windows-style event logging on OpenVMS, enabling the recording and viewing of COM events and custom application events through Windows Event Viewer, HP Advanced Server, or a local log file.
• Authentication and Interoperation: Provides information on how OpenVMS and Windows systems authenticate users and applications, including NTLM security features and cross-domain configurations.

The guide also includes release notes, troubleshooting information, API listings, and examples for application development.