Go Komura

How to Work with USB Devices from a Windows App — Choosing Between virtual COM, HID, WinUSB, and Vendor SDKs (archived 2026-08-30)

A comparison of four ways to control equipment and USB devices from a Windows application: virtual COM port, HID, WinUSB, and vendor SDKs. We cover whether a driver has to be installed, identifying devices when several are connected, following hot-plug events, and the ceiling on...

Building an Intake for Internal Requests with Microsoft Forms — Consolidating Email and Verbal Requests into a Form (archived 2026-08-30)

A practical guide to consolidating the email and verbal requests that land on IT, general affairs, and accounting into Microsoft Forms. Covers question design and branching, the difference between organization-only and anonymous forms, transcription to SharePoint and approval int...

Can the Labour-Saving Investment Subsidy Pay for Moving FAX Orders to the Web? — How to Think About Order-System Investment Under the General Type (archived 2026-08-30)

Moving FAX order intake to the web with automated import can be a candidate for the SME Labour-Saving Investment Subsidy (General type). This article covers the difference between the Catalog Order type and the General type, why an order-processing system counts as a labour-savin...

The Depths of Windows Memory (Part 3) — Section Objects and Copy-on-Write: What DLLs and File Mappings Really Are (archived 2026-08-30)

This article connects section objects, image and data mappings, the shared cache, and copy-on-write to explain how DLLs and shared memory share physical pages. Archived version of https://comcomponent.com/en/blog/windows-memory-internals-section-copy-on-write/, as published on 20...

Handling Credentials Safely in PowerShell — Banishing Plaintext Passwords from Your Scripts (archived 2026-08-30)

A practical walkthrough of moving plaintext passwords out of PowerShell scripts and into safe storage: what SecureString really is and where it stops, how Export-Clixml stores credentials with DPAPI, and where SecretManagement/SecretStore fit. Archived version of https://comcompo...

The Depths of Windows Memory (Part 1) — The Moment a Virtual Address Becomes Physical RAM: A Page Fault from Start to Finish (archived 2026-08-30)

This article connects VirtualAlloc, VADs, page tables, the TLB, demand-zero faults, and hard faults to explain the moment a virtual address is assigned physical RAM. Archived version of https://comcomponent.com/en/blog/windows-memory-internals-page-fault/, as published on 2026-08...

Code Design for Business Systems — Deciding Product and Customer Codes, and Check Digits (archived 2026-08-30)

A practical guide to deciding the code scheme for a business system, including product and customer codes. Covers a decision table for meaningful codes versus meaningless serial numbers, check digit formulas such as JAN and Luhn with C# implementations, avoiding Excel's dropped l...

DllMain and the Loader Lock — The Real Reason You're Told to "Do Nothing in DLL Initialization" (archived 2026-08-30)

Why you must not call LoadLibrary or synchronize with other threads from DllMain. Drawing on primary sources, this article explains how the loader lock serializes every DLL notification, the classic scenarios in which a deadlock is structurally guaranteed, the correct design of d...

Named Pipes in Practice — Windows' Standard IPC from Design to Security (archived 2026-08-30)

A practical guide to named pipes, Windows' standard inter-process communication. This article organises, from primary sources, the choice between byte and message mode, server designs that handle multiple clients, ACL and impersonation security, and .NET named-pipe streams. Archi...

Windows Security Audit Policy and Event Log Investigation in Practice — Becoming an IT Team That Can Read Event 4625 (archived 2026-08-30)

A practical guide for answering "please look into the failed sign-in logs." It covers the relationship between basic and advanced audit policy, the subcategories you should enable at minimum, how to read event IDs 4624/4625/4688, Security log capacity design, and extraction with...

Stop Using Write-Host — PowerShell Output Streams and Log Design (archived 2026-08-30)

How to choose between PowerShell's six output streams, the problems with Write-Host and where it genuinely belongs, why function return values get polluted, letting the caller control verbosity with -Verbose and -InformationVariable, and how to leave structured logs behind. Archi...

Protecting PowerShell Script Quality with PSScriptAnalyzer — Rule Selection and CI Integration (archived 2026-08-30)

A practical guide to introducing PSScriptAnalyzer, PowerShell's static analysis module, to your in-house scripts. Covers the rules to enable first, how to write the settings file, phased rollout across existing assets, and automating the check in CI with GitHub Actions. Archived...

Protecting PowerShell Script Quality with PSScriptAnalyzer — Rule Selection and CI Integration (archived 2026-08-30)

A practical guide to introducing PSScriptAnalyzer, PowerShell's static analysis module, to your in-house scripts. Covers the rules to enable first, how to write the settings file, phased rollout across existing assets, and automating the check in CI with GitHub Actions. Archived...

Grasping the Whole Nichi-Rece API from the Source Code — Reading ORCA's Published Source (with a Mapping Table of All 137 Endpoints) (archived 2026-08-30)

Grasping the whole picture of the Nichi-Rece API from the published source code of ORCA (the JMA Standard Receipt Software). Covers a mapping table of all 137 endpoints, a worked example following patientgetv2, a measured diff against the 5.1 series, and deriving the specificatio...

Reading Faxed Purchase Orders With AI Builder — A Realistic Design for Cutting Manual Data Entry, and Where It Stops (archived 2026-08-30)

A walkthrough of how to cut manual entry of faxed purchase orders using AI Builder document processing: turning faxes into PDFs on the MFP, training a custom model, a flow that inserts a human check based on confidence scores, the cost of credits, and where the line falls against...

What Is OpenHarmony? — Sorting Out How It Differs from HarmonyOS and HarmonyOS NEXT (archived 2026-08-30)

OpenHarmony and HarmonyOS are not the same thing. This article works systematically through the relationship between the open source OS run by the OpenAtom Foundation, Huawei's commercial OS, and HarmonyOS NEXT onwards with its Android compatibility removed — all based on primary...

An Introduction to Windows App Accessibility — Preparing for UI Automation and Reasonable-Accommodation Requirements (archived 2026-08-30)

Against the backdrop of the amended Act for Eliminating Discrimination against Persons with Disabilities, which took effect in April 2024, this article organises naming in WinForms/WPF, keyboard operation, contrast, and verification tools from a practical standpoint, centred on U...

Taking Inventory of a File Server with PowerShell — Capacity Analysis and Access Permission (ACL) Auditing (archived 2026-08-30)

A practical procedure for taking inventory of a file server with PowerShell. Covers capacity analysis and recording access denials, listing old files and extracting duplicate candidates by hash, permission auditing with Get-Acl and detecting broken inheritance, producing CSV repo...

Distributing and Updating PowerShell Modules In-House — PSResourceGet and an Internal Repository (archived 2026-08-30)

How to move on from copying and reusing ps1 files in a shared folder. Covers how to write a module manifest, versioning, building an internal repository with PSResourceGet and distributing and updating through it, and how it combines with code signing. Archived version of https:/...

What "Not Responding" Really Is — How Windows Decides an App Has Hung, and How to Design Apps That Don't (archived 2026-08-30)

Windows' "Not Responding" is a mechanism in which the OS judges that a window has not retrieved a message for 5 seconds and replaces it with a ghost window. This article covers the internals of that judgment, the classic causes of hangs, designs that move heavy work off the UI th...