Blogs

Technical notes from this site plus external writing on Qiita and Zenn.

Writing sources

Follow the same Windows, C#, and reverse engineering notes across platforms.

0x5BFA.dev

Long-form notes, app writeups, and reverse engineering deep dives hosted here.

Qiita

Japanese posts and quick technical notes on Windows, C#, C++, and reverse engineering.

Zenn

Books and articles for longer Japanese technical material.

0x5BFA.dev

June 14, 2026

Inside the Windows 11 Explorer Command Bar

Reverse engineering the modern Windows 11 Explorer command bar, from ExplorerRibbonProxy and XAML Islands to UnifiedTile verbs and WinUI command execution.

June 10, 2026

How Font Folder View Works

Reverse engineering why C:\Windows\Fonts does not look like a normal Explorer folder, and how its font thumbnails are produced.

June 7, 2026

How Explorer resolves address bar input

Reverse engineering how Explorer turns typed address bar text like C:\Windows and shell:Downloads into PIDLs.

February 6, 2026

How pinning/unpinning a folder works

Deep dive into RE'ing the functionality of pinning a folder to Quick Access with IDA Pro.