Articles Tagged “Legacy Technology”
8 articles tagged “Legacy Technology”, newest first.
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DLL and COM Interface Backward Compatibility — A Decision Table for Which Changes Break Callers
Which changes to a DLL or COM component actually break their callers? We lay out the three layers of compatibility — binary, source, and behavioral — a decis...
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Safely Modifying a Legacy Business App That Has No Tests — Characterization Testing and Refactoring in Practice
To safely modify a business application with no tests, this article explains, with C# examples, the procedure for a characterization test (the golden master ...
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When You Inherit a System With No Source Code and No Documentation — A Practical Playbook for Keeping It Running
A practical playbook for starting operations and maintenance on a business system that has no source code and no specifications. Covers preserving and backin...
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How Long Will VB6 Apps Keep Running? — Runtime Support Status and a Practical Path to .NET Migration
How long will VB6 applications keep running? This practical guide clarifies the asymmetry between the VB6 runtime support policy (still supported on Windows ...
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Automating Business Processes with Power Automate — Cloud Flows, Desktop Flows, and Robust Error Handling
A practical design guide to Power Automate: the difference between cloud flows and desktop flows, when to use PowerShell or VBA instead, licensing, error han...
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The Minimum You Need to Know Before Reading COBOL Source Code
For anyone suddenly handed COBOL source code: a minimum set covering DIVISIONs, PIC, COMP-3, COPY, PERFORM, fixed format, and how to spot external boundaries.
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What Is Reg-Free COM - Using COM Without Registration
An overview of Reg-Free COM basics, the roles of activation contexts and manifests, the benefits, the limitations, and how to decide when to use it in practice.
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What Are COM / ActiveX / OCX? - The Differences and Relationships Explained
A practical guide to what COM is, what ActiveX is, and what OCX is - covering their differences and relationships, the connection to OLE, where they are used...