KomuraSoft LLC Blog
Windows / C# / COM engineering notes from KomuraSoft LLC.
https://comcomponent.com/en/feed.xml
2026-04-16T00:00:00+00:00
© 2026 KomuraSoft LLC
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小村 豪
https://comcomponent.com/en/profile/go-komura/
What GS1 and Related Barcode Standards Actually Define, and What to Watch for in Real Operations - Organizing GTIN, AI, GS1-128, and GS1 DataMatrix
https://comcomponent.com/en/blog/2026/04/16/000-gs1-barcode-standards-practical-guide/
2026-04-16T00:00:00+00:00
2026-04-16T00:00:00+00:00
A practical guide to what is standardized in GS1 barcode standards, how GTIN, AI, GS1-128, GS1 DataMatrix, and GS1 QR Codes differ, and where real operational projects tend to get stuck.
Go Komura
Common Pitfalls in COM Components and OCX / ActiveX Development - Visual Studio 32-bit / 64-bit, Registration, and Admin-Rights Traps
https://comcomponent.com/en/blog/2026/04/15/001-com-ocx-activex-pitfalls-visual-studio-bitness-admin-rights/
2026-04-15T01:00:00+00:00
2026-04-15T01:00:00+00:00
A practical guide to the 32-bit / 64-bit issues, Visual Studio 2022 becoming 64-bit, regsvr32 / Regasm, admin rights, HKCR / HKCU / HKLM, and STA / MTA pitfalls that commonly cause trouble in COM component, OCX, and ActiveX development.
Go Komura
Where Exceptions Should Be Caught, Logged, and Handled - A Practical Guide to Boundaries and Responsibilities in the Call Hierarchy
https://comcomponent.com/en/blog/2026/04/15/000-exception-catching-logging-error-handling/
2026-04-15T01:00:00+00:00
2026-04-15T01:00:00+00:00
A practical guide to deciding at each call-hierarchy boundary where exceptions should be caught, where the main log should be written, and where failures should be turned into results or recovery decisions, so that broad catches in deep helpers, duplicate logs across layers, and root-cause loss through null or false returns are avoided.
Go Komura
What ClickOnce Is: How It Works, How Updates Work, and When It Fits or Does Not Fit in Practice
https://comcomponent.com/en/blog/2026/04/13/001-clickonce-what-is/
2026-04-13T10:10:00+00:00
2026-04-13T10:10:00+00:00
A practical guide to ClickOnce for .NET Windows desktop app deployment, with Mermaid diagrams covering manifests, updates, caching, signing, and the kinds of projects where it fits well or poorly.
Go Komura
What Windows Efficiency Mode Is: What the Green Leaf Icon Means in Windows 11 and How to Turn It Off
https://comcomponent.com/en/blog/2026/04/13/002-windows-efficiency-mode-what-it-is-and-how-to-turn-off/
2026-04-13T01:00:00+00:00
2026-04-13T01:00:00+00:00
A practical guide to what Efficiency Mode in Windows 11 Task Manager means, how to read the green leaf icon, how to turn it off, when you cannot turn it off, and how it differs from Microsoft Edge power-saving features.
Go Komura
How to Use Windows Sandbox to Speed Up Windows App Validation - Admin Rights, Clean Environments, and Reproducing Missing-Permission or Low-Resource Cases
https://comcomponent.com/en/blog/2026/04/13/000-windows-sandbox-appdev-validation-guide/
2026-04-13T01:00:00+00:00
2026-04-13T01:00:00+00:00
A practical guide to using Windows Sandbox to validate Windows apps faster by separating admin-rights issues, reproducing clean-environment failures, and testing restricted or low-resource conditions with `.wsb` files and the CLI.
Go Komura
Why PPAP Is a Bad Email Security Practice and What to Do Instead
https://comcomponent.com/en/blog/2026/04/03/000-why-ppap-is-bad-and-what-to-do/
2026-04-03T10:00:00+00:00
2026-04-03T10:00:00+00:00
A practical guide to why sending a password-protected ZIP by email and then sending the password in a second email is no longer a sound security control, and what SMEs should use instead.
Go Komura
If You Have to Build Your Own Logger, What Is the Minimum You Actually Need? - Practical Requirements and Integration Test Checks
https://comcomponent.com/en/blog/2026/04/02/001-custom-logger-minimum-requirements-and-integration-test-checklist/
2026-04-02T10:00:00+00:00
2026-04-02T10:00:00+00:00
A practical guide to the minimum requirements for a custom application logger and the integration tests worth running with real files, threads, and processes.
Go Komura
How SMEs Can Design Bulk Email Without Locking Themselves into One Vendor
https://comcomponent.com/en/blog/2026/04/02/000-sme-bulk-email-vendor-neutral-practical-guide/
2026-04-02T10:00:00+00:00
2026-04-02T10:00:00+00:00
A practical guide for SMEs that want to send tens to hundreds of announcement emails from their own domain and site without relying on a dedicated vendor or Bcc blasts.
Go Komura
Why a Business Website Should Exist - Turning a Company Site into Profit
https://comcomponent.com/en/blog/2026/03/26/000-why-business-website-drives-profit/
2026-03-26T10:00:00+00:00
2026-03-26T10:00:00+00:00
Why a business website matters, and how it contributes to profit across search, comparison, inquiry, and sales. A practical guide to treating a company site as a business foundation rather than a brochure.
Go Komura
Where Unit Tests End and Integration Tests Begin - A Practical Boundary Guide
https://comcomponent.com/en/blog/2026/03/25/004-unit-test-vs-integration-test-boundary-guide/
2026-03-25T10:00:00+00:00
2026-03-25T10:00:00+00:00
A practical guide to drawing the boundary between unit tests and integration tests by separating pure logic, formatting, wiring, environment differences, and time-dependent behavior.
Go Komura
How to Connect Articles and Service Pages with Internal Links
https://comcomponent.com/en/blog/2026/03/25/003-internal-linking-between-articles-and-service-pages/
2026-03-25T10:00:00+00:00
2026-03-25T10:00:00+00:00
How to connect articles to service pages with natural internal-link design, anchor text, and related-link placement.
Go Komura
How to Build a Service Page for Technical B2B Companies
https://comcomponent.com/en/blog/2026/03/25/002-service-page-structure-for-technical-b2b/
2026-03-25T10:00:00+00:00
2026-03-25T10:00:00+00:00
A practical guide to the role, headings, copy, CTA, and inquiry flow of a service page for technical B2B businesses.
Go Komura
When a Site Gets No Inquiries, the First Three Places to Fix
https://comcomponent.com/en/blog/2026/03/25/001-inquiry-flow-fix-first-three-places/
2026-03-25T10:00:00+00:00
2026-03-25T10:00:00+00:00
A practical guide to the first three places to fix when a site gets no inquiries: the homepage, the service page, and the contact page.
Go Komura
Why Technical B2B Homepages Fail to Show What the Company Actually Does
https://comcomponent.com/en/blog/2026/03/25/000-website-development-why-unclear-business-message/
2026-03-25T10:00:00+00:00
2026-03-25T10:00:00+00:00
A practical guide to why technical B2B homepages fail to explain the business clearly, and how to fix the homepage, service pages, and company page.
Go Komura
How DLL Name Resolution Works on Windows: Search Order, Known DLLs, API Sets, and SxS in Practice
https://comcomponent.com/en/blog/2026/03/24/002-windows-dll-name-resolution/
2026-03-24T10:00:00+00:00
2026-03-24T10:00:00+00:00
A practical guide to Windows DLL name resolution, covering search order, Known DLLs, loaded-module checks, API sets, SxS manifests, and the impact of LoadLibrary APIs.
Go Komura
When UUIDs Collide in Practice: Bad Operational and Implementation Patterns
https://comcomponent.com/en/blog/2026/03/24/001-uuid-collision-bad-implementation-patterns/
2026-03-24T10:00:00+00:00
2026-03-24T10:00:00+00:00
A practical guide to the operational and implementation mistakes that make UUID collisions real, from fixed seeds and snapshot rollback to namespace misuse, truncation, and custom formats.
Go Komura
SEO and Google Ads Best Practices: A General Blueprint for Search Acquisition
https://comcomponent.com/en/blog/2026/03/24/000-seo-google-ads-best-practices/
2026-03-24T10:00:00+00:00
2026-03-24T10:00:00+00:00
A general guide to SEO and Google Ads that connects search intent, crawlability, page experience, measurement, Smart Bidding, and Consent Mode into one search acquisition system.
Go Komura
When Windows Admin Privileges Are Actually Required: UAC, Protected Areas, and Practical Design Boundaries
https://comcomponent.com/en/blog/2026/03/23/001-windows-admin-privilege-when-required/
2026-03-23T10:00:00+00:00
2026-03-23T10:00:00+00:00
A practical guide to when Windows admin privileges are truly required, covering UAC, protected locations, services, drivers, and per-user versus per-machine design.
Go Komura
What VBA Is: Limits, Future Outlook, When to Replace It, and Practical Migration Patterns
https://comcomponent.com/en/blog/2026/03/23/000-what-is-vba-limits-future-replacement/
2026-03-23T10:00:00+00:00
2026-03-23T10:00:00+00:00
A practical guide to what VBA is, its limits, where replacement makes sense, and how to migrate existing Excel or Access assets in stages.
Go Komura
Understanding Text Encodings on Windows - Why Mojibake Happens and What Breaks When Linux Gets Involved
https://comcomponent.com/en/blog/2026/03/21/000-windows-text-encoding-mojibake-linux/
2026-03-21T10:00:00+00:00
2026-03-21T10:00:00+00:00
A practical guide to Windows text encodings, mojibake, and the common failure points that appear when CP932, UTF-8, UTF-16, PowerShell, and Linux locale assumptions collide.
Go Komura
Best Practices for Checking and Displaying External Device State - Why 'Connected' Is Not Enough
https://comcomponent.com/en/blog/2026/03/20/002-external-device-state-check-display-best-practices/
2026-03-20T10:00:00+00:00
2026-03-20T10:00:00+00:00
A practical guide to external device state handling in Windows apps, covering detection, responsiveness, usability, data freshness, UI wording, and reconnect behavior.
Go Komura
Checklist for Safe Child-Process Handling in Windows Apps - Job Objects, Exit Propagation, stdio, and Watchdog Design
https://comcomponent.com/en/blog/2026/03/20/001-windows-app-safe-child-process-handling-job-object-exit-propagation-stdio-watchdog/
2026-03-20T10:00:00+00:00
2026-03-20T10:00:00+00:00
A practical guide to safe child-process handling in Windows applications, covering Job Objects, exit propagation, stdio draining, and watchdog design.
Go Komura
How to Choose a Windows App Deployment Model - MSI, MSIX, ClickOnce, xcopy, and Custom Updaters
https://comcomponent.com/en/blog/2026/03/20/000-windows-app-deployment-msi-msix-clickonce-xcopy-custom-updater/
2026-03-20T10:00:00+00:00
2026-03-20T10:00:00+00:00
A practical guide to choosing between MSI, MSIX, ClickOnce, xcopy deployment, and custom updaters for Windows applications.
Go Komura
How Far Can a Windows App Really Be a Single Binary? What Fits in One EXE and What Still Depends on Windows
https://comcomponent.com/en/blog/2026/03/19/003-windows-single-binary-and-os-dependencies/
2026-03-19T10:00:00+00:00
2026-03-19T10:00:00+00:00
A practical guide to what can really be bundled into one Windows executable, where OS dependencies remain, and how to decide before shipping.
Go Komura
Best Practices for Avoiding Mojibake with Codex on Windows - Clear Prompting Before Environment Tweaks
https://comcomponent.com/en/blog/2026/03/19/002-codex-windows-mojibake-prompting-best-practices/
2026-03-19T10:00:00+00:00
2026-03-19T10:00:00+00:00
A practical guide to reducing mojibake accidents with Codex on Windows by defining safe read, write, and verification rules before editing files.
Go Komura
Serial Communication App Pitfalls - Framing, Timeouts, Flow Control, Reconnects, USB Adapters, and UI Freezes
https://comcomponent.com/en/blog/2026/03/19/001-serial-communication-app-pitfalls/
2026-03-19T10:00:00+00:00
2026-03-19T10:00:00+00:00
A practical guide to serial communication app pitfalls in Windows, covering framing, timeouts, flow control, reconnects, USB serial adapters, and logging design.
Go Komura
How to Preserve Crash Logs in Windows Apps Even When They Die from Programming Errors - Best Practices with WER, Final Markers, and Watchdog Design
https://comcomponent.com/en/blog/2026/03/19/000-windows-app-crash-logging-best-practices/
2026-03-19T10:00:00+00:00
2026-03-19T10:00:00+00:00
A practical guide to preserving useful crash evidence in Windows apps by combining normal logs, final crash markers, WER LocalDumps, and watchdog-style supervision instead of trusting in-process recovery alone.
Go Komura
Windows App UX Design Thinking - A Decision Table for ToC, ToB, Monitoring, Field Terminals, and Tray Tools
https://comcomponent.com/en/blog/2026/03/18/002-windows-app-ux-design-decision-table/
2026-03-18T10:00:00+00:00
2026-03-18T10:00:00+00:00
A practical UX decision table for Windows applications, organized by ToC / ToB context, input method, work environment, and the cost of mistakes.
Go Komura
How to Choose Between Windows Forms, WPF, and WinUI - A Decision Table for New Development, Existing Assets, Deployment, and UI Needs
https://comcomponent.com/en/blog/2026/03/18/001-winforms-wpf-winui-decision-table/
2026-03-18T10:00:00+00:00
2026-03-18T10:00:00+00:00
A practical decision table for choosing between Windows Forms, WPF, and WinUI based on new development, existing assets, deployment, UI richness, and team culture.
Go Komura