wasabi

Precompiled zlib DLLs for Wasabi (permessage-deflate)

This directory contains pre‑compiled builds of zlib that work with the Wasabi WebSocket module. They are required only if you want to use the permessage-deflate compression extension (RFC 7692).

Files

File Architecture Calling convention
zlib1_x86.dll 32‑bit (x86) stdcall (WINAPI)
zlib1_x64.dll 64‑bit (x64) stdcall (WINAPI)

Source

These DLLs were extracted from the Joveler.Compression.ZLib NuGet package (version 4.2.0), which distributes official zlib builds compiled with ZLIB_WINAPI – the calling convention required by Wasabi’s VBA declarations.

Version 4.2.0 is the last release that provides stdcall binaries (zlibwapi.dll). Later versions (5.0.0+) switched to cdecl and are not compatible with Wasabi.

How they were obtained

  1. Download the .nupkg file from the link above.
  2. Rename the extension from .nupkg to .zip.
  3. Extract the archive and navigate to:
    • runtimes/win-x86/native/zlibwapi.dll → 32‑bit stdcall
    • runtimes/win-x64/native/zlibwapi.dll → 64‑bit stdcall
  4. Rename each DLL to match Wasabi’s expected names:
    • zlibwapi.dll (x86) → zlib1_x86.dll
    • zlibwapi.dll (x64) → zlib1_x64.dll

The renamed files are the ones you find in this folder.

Where to place them

Copy the DLL that matches your Office architecture to the same folder as your Excel workbook, Word document, or add‑in. Wasabi searches this location first.

For a complete description of the search order, fallback names, and compression configuration, please refer to the main documentation:

../docs/README.md – Optional zlib Dependency

Version info

[!NOTE] If you need a different zlib version or prefer to build from source, follow the compilation instructions inside the main documentation. Official source code is available at https://zlib.net.

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