WinMerge Source Code

WinMerge is an Open Source differencing and merging tool
for Windows. WinMerge can compare both folders and files, presenting differences
in a visual text format that is easy to understand and handle.


Visual Studio 2017

  • Community, Professional or Enterprise Edition
  • VC++ 2017 v141 toolset
  • Windows XP support for C++
  • MFC and ATL support
  • Windows 10 SDK

Visual Studio 2019

  • Community, Professional or Enterprise Edition
  • MSVC v142 Buildtools
  • C++ MFC for v142 Buildtools
  • Windows 10 SDK

Folder Structure

Source code for the WinMerge program, its plugins, filters, setup program,
and various utilities are all kept in various subfolders listed below.

Changelog file is in Docs/Users/ChangeLog.txt and it logs user-visible
or otherwise significant changes.

Subfolders include:

  • Docs
    Both user and developer documentation, in different subfolders.
    Can be browsed by opening index.html in Docs folder.

  • Src
    Source code to the WinMerge program itself.

  • Plugins
    Source code and binaries for WinMerge runtime plugin dlls & scripts

  • Filters
    WinMerge file filters which are shipped with the distribution.

  • ArchiveSupport
    Source code for the Merge7z dlls, which connect WinMerge with 7-Zip
    Also this folder is required to compile WinMergeU.exe. There
    is also standalone installer for Merge7z dlls.

  • Externals
    This folder contains several libraries whose sources come from
    outside WinMerge project. They are stored here for convenience for
    building and possible needed small changes for WinMerge. Libraries
    include XML parser and regular expression parser.

  • Installer
    Installer for WinMerge.

  • Tools
    Various utilities used by WinMerge developers; see readme files in each.

  • ShellExtension
    Windows Shell (Explorer) integration. Adds menuitems to Explorer context
    menu for comparing files and folders.

  • Testing
    A suite of test diff files and a script to run them and report the results.
    This folder also has Google Test subfolder containing unit tests made
    with Google Test Framework.

  • Build
    This folder gets created by compiler when WinMerge is compiled. It
    contains compiled executables, libraries, user manual etc.

  • BuildTmp
    This folder gets created by compiler when WinMerge is compiled. It
    contains temporary files created during the compilation and can be safely