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Display folder sizes in Windows Explorer's Size column via a lightweight COM shell extension

1 starsC++

Display folder sizes in Win11 Explorer's Size column

by hereme888·Mar 4, 2026·2 points·3 comments

AI Analysis

●●SolidWizardryNiche Gem

COM hook + Detours + Everything IPC beats Windhawk's thread-local guard design.

Strengths
  • RAII recursive guard prevents exceptions leaking state during Explorer operations.
  • Thread-safe LRU cache (50MB bounded) with TTL outperforms ad-hoc map expiry.
  • Multi-output logging to DebugView and file with source location, not just Wh_Log.
Weaknesses
  • Requires Everything service running; fails silently if absent, adding hidden dependency.
  • Windows x64-only; COM shell extensions are system-level fragile and hard to debug.
Target Audience

Windows power users, system administrators, developers managing large directory trees

Similar To

Windhawk (property-sheet mods) · Everything (file indexing)

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