GS1 Syntax Engine: update Windows README and various project files

to get working using nmake "makefile.vcwin32", added to fork at https://github.com/gitlost/gs1-syntax-engine; small updates to Linux, macOS READMEs GUI: change "chkGS1Strict" to be hidden instead of manually adding pandoc: latest version
2025-12-18 10:27:09 +00:00 · 2025-09-16 02:19:50 +01:00
parent 008dff4aec
commit e4e6143d87
18 changed files with 136 additions and 107 deletions
--- a/README.linux
+++ b/README.linux
@@ -1,4 +1,4 @@
-% README.linux 2025-09-12
+% README.linux 2025-09-16
 % Tested on Ubuntu 20.04.4 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and
 % Fedora Linux 42 (Workstation Edition)

@@ -29,6 +29,7 @@ and navigate to "src/c-lib" and make with EXCLUDE_SYNTAX_DICTIONARY_LOADER defin

    cd gs1-syntax-engine/src/c-lib
    make CFLAGS_G='-DEXCLUDE_SYNTAX_DICTIONARY_LOADER' lib && sudo make install
+    cd ../../..

 Now either download the zint source code tarball

@@ -118,6 +119,7 @@ The rest is standard CMake
    make
    sudo make install

+
 4. Run
 ======

--- a/README.macos
+++ b/README.macos
@@ -1,4 +1,4 @@
-% README.macos 2025-09-12
+% README.macos 2025-09-16
 % Tested on macOS 12.7.2 Monterey VirtualBox (thanks to https://github.com/myspaghetti/macos-virtualbox)

 1. Prerequisites for building zint and zint-qt
@@ -34,6 +34,7 @@ Clone and install the gs1encoders library (optional but necessary for GS1 Syntax
    git clone https://github.com/gs1/gs1-syntax-engine
    cd gs1-syntax-engine/src/c-lib
    make CFLAGS_G='-DEXCLUDE_SYNTAX_DICTIONARY_LOADER' lib && sudo make install
+    cd ../../..

 Add the Qt5 bin directory to the PATH

--- a/backend_qt/backend_qt.pro
+++ b/backend_qt/backend_qt.pro
@@ -19,10 +19,11 @@ INCLUDEPATH += ../backend
 #EDIT THIS !!!!
 DEFINES += ZINT_VERSION="\\\"2.15.0.9\\\""

-!contains(DEFINES, ZINT_NO_PNG) {
-    INCLUDEPATH += ../../lpng
-    INCLUDEPATH += ../../zlib
-}
+INCLUDEPATH += ../../lpng
+INCLUDEPATH += ../../zlib
+
+DEFINES += ZINT_HAVE_GS1SE
+INCLUDEPATH += ../../gs1-syntax-engine/src/c-lib

 HEADERS +=  ../backend/aztec.h \
            ../backend/big5.h \
--- a/backend_qt/backend_qt_zintdll.pro
+++ b/backend_qt/backend_qt_zintdll.pro
@@ -6,8 +6,6 @@ TARGET = QtZintDLL

 INCLUDEPATH += ../backend

-LIBS += -L"../win32/Release" -lzint
-
 HEADERS += qzint.h

 SOURCES += qzint.cpp
--- a/docs/README
+++ b/docs/README
@@ -1,11 +1,11 @@
-% docs/README 2025-06-05
+% docs/README 2025-09-16

 For generation of "docs/manual.pdf" and "docs/manual.txt" from "manual.pmd" using a recent version of pandoc

 On Ubuntu/Debian (tested on Ubuntu 22.04 and Ubuntu 24.04)

-    wget https://github.com/jgm/pandoc/releases/download/3.7.0.2/pandoc-3.7.0.2-1-amd64.deb
-    sudo dpkg -i pandoc-3.7.0.2-1-amd64.deb
+    wget https://github.com/jgm/pandoc/releases/download/3.8/pandoc-3.8-1-amd64.deb
+    sudo dpkg -i pandoc-3.8-1-amd64.deb
 For Ubuntu 22.04 (python < 3.12)
    sudo apt install python3-pip
    pip install pandoc-tablenos --user
@@ -27,9 +27,9 @@ Then

 On Fedora (tested on Fedora Linux 38 (Workstation Edition) and Fedora Linux 40 (Workstation Edition))

-    wget https://github.com/jgm/pandoc/releases/download/3.7.0.2/pandoc-3.7.0.2-linux-amd64.tar.gz
-    tar xf pandoc-3.7.0.2-linux-amd64.tar.gz
-    sudo mv -i pandoc-3.7.0.2/bin/pandoc /usr/local/bin
+    wget https://github.com/jgm/pandoc/releases/download/3.8/pandoc-3.8-linux-amd64.tar.gz
+    tar xf pandoc-3.8-linux-amd64.tar.gz
+    sudo mv -i pandoc-3.8/bin/pandoc /usr/local/bin
    sudo dnf install python3-pip
    pip install pandoc-tablenos --user
    export PATH=~/.local/bin:"$PATH"
--- a/docs/zint.1
+++ b/docs/zint.1
@@ -1,4 +1,4 @@
-.\" Automatically generated by Pandoc 3.7.0.2
+.\" Automatically generated by Pandoc 3.8
 .\"
 .TH "ZINT" "1" "September 2025" "Version 2.15.0.9"
 .SH NAME
--- a/frontend_qt/frontend_qt.pro
+++ b/frontend_qt/frontend_qt.pro
@@ -4,10 +4,10 @@ DEPENDPATH += . debug release
 INCLUDEPATH += .
 INCLUDEPATH += ../backend
 INCLUDEPATH += ../backend_qt
-!contains(DEFINES, ZINT_NO_PNG) {
-    INCLUDEPATH += ../../lpng
-    INCLUDEPATH += ../../zlib
-}
+INCLUDEPATH += ../../lpng
+INCLUDEPATH += ../../zlib
+INCLUDEPATH += ../../gs1-syntax-engine/src/c-lib
+
 QT += uitools
 QT += widgets
 QT += svg
@@ -89,11 +89,9 @@ QMAKE_LIBDIR += ../backend_qt/release
 LIBS += -lQt5Core
 QMAKE_LIBDIR += C:/qt/5.15.16static/lib

-!contains(DEFINES, ZINT_NO_PNG) {
 # Win
-    win32:LIBS += -llibpng -lzlib
-    win32:QMAKE_LIBDIR+=../../lpng/ ../../zlib
+    win32:LIBS += -llibpng -lzlib -lgs1encoders
+    win32:QMAKE_LIBDIR+=../../lpng/ ../../zlib ../../gs1-syntax-engine/src/c-lib
 # Unix
-    #unix:LIBS += -lpng -zlib
+    #unix:LIBS += -lpng -zlib -lgs1encoders
    #unix:QMAKE_LIBDIR += /usr/local/lib /usr/lib/x86_64-linux-gnu/
-}
--- a/frontend_qt/frontend_qt_zintdll.pro
+++ b/frontend_qt/frontend_qt_zintdll.pro
@@ -71,6 +71,6 @@ RC_FILE += res/qtZint.rc

 INCLUDEPATH += ../backend_qt ../backend

-LIBS += -lQtZintDLL -lzint
+LIBS += -lQtZintDLL -L"../win32/Release" -L"../win32/vs2019/Release" -L"../win32/vs2017/Release" -L"../win32/vs2015/Release" -lzint
 QMAKE_LIBDIR += ../backend_qt/release
 QMAKE_LIBDIR += ../win32/Release
--- a/frontend_qt/howto_build_qzint_using_msvs2015.txt
+++ b/frontend_qt/howto_build_qzint_using_msvs2015.txt
@@ -1,5 +1,5 @@
 Harald Oehlmann
-2025-02-04
+2025-09-16

 How to build qzint.exe using:
 - QT 5.15.16 source package
@@ -17,6 +17,11 @@ Build static Qt:
  Visual Studio 2015\Visual Studio Tools\Windows Desktop Command Prompts\VS2015 x86 Native Tools-Eingabeaufforderung
 - ("Eingabeaufforderung" = "Command Prompt")

+- WARNING: MS Visual Studio 2015 will only work with up to Windows Kit 10.0.20348.0, which was removed in a recent update
+  (see https://developercommunity.visualstudio.com/t/Visual-Studio-update-171411-removed-th/10953401?sort=newest)
+  It can be reinstalled at https://developer.microsoft.com/en-us/windows/downloads/sdk-archive/index-legacy
+  You may need to manually reset the environment variables INCLUDE, LIB, UCRTVersion, WindowsSDKLibVersion and WindowsSDKVersion.
+
 - Note: if "rc.exe" not available, install a Windows Kit and update PATH (e.g.):
  set "PATH=C:\Program Files (x86)\Windows Kits\10\bin\10.0.20348.0\x86;%PATH%"

@@ -45,6 +50,9 @@ Zint Folder structure:
  git clone https://github.com/madler/zlib.git "%ZH%\..\zlib"
 -> %ZH%\..\zlib\zlib.h exists

+- gs1-syntax-engine source files in %ZH%\..\gs1-syntax-engine
+  git clone https://github.com/gitlost/gs1-syntax-engine "%ZH%\..\gs1-syntax-engine"
+
 Build libpng:
 -------------
  cd "%ZH%\..\zlib"
@@ -54,6 +62,12 @@ Build libpng:
  nmake -f scripts\makefile.vcwin32 clean
  nmake -f scripts\makefile.vcwin32

+Build gs1-syntax-engine:
+------------------------
+  cd "%ZH%\..\gs1-syntax-engine\src\c-lib"
+  nmake -f makefile.vcwin32 clean
+  nmake -f makefile.vcwin32
+
 Build zint:
 -----------
  set QTDIR=C:\Qt\5.15.16static
--- a/frontend_qt/mainWindow.ui
+++ b/frontend_qt/mainWindow.ui
@@ -1623,6 +1623,25 @@ checks necessary for encodation are still performed)
               </property>
              </widget>
             </item>
+             <item>
+              <widget class="QCheckBox" name="chkGS1Strict">
+               <property name="toolTip">
+                <string>Use GS1 Syntax Engine to
+strictly verify GS1 data,
+including GS1 Digital Link URIs
+(ignored if disabled)</string>
+               </property>
+               <property name="text">
+                <string>GS1 St&amp;rict</string>
+               </property>
+               <property name="checked">
+                <bool>false</bool>
+               </property>
+               <property name="hidden">
+                <bool>true</bool>
+               </property>
+              </widget>
+             </item>
            </layout>
           </item>
          </layout>
--- a/frontend_qt/mainwindow.cpp
+++ b/frontend_qt/mainwindow.cpp
@@ -229,7 +229,7 @@ void MainWindow::mac_hack_statusBars(QWidget *win, const char* name)

 MainWindow::MainWindow(QWidget *parent, Qt::WindowFlags fl)
        : QWidget(parent, fl), m_previewBgColor(0xF4, 0xF4, 0xF4), m_optionWidget(nullptr), m_symbology(0),
-          m_menu(nullptr), m_chkGS1SyntaxEngine(nullptr),
+          m_menu(nullptr),
          m_lblHeightPerRow(nullptr), m_spnHeightPerRow(nullptr),
          m_btnHeightPerRowDisable(nullptr), m_btnHeightPerRowDefault(nullptr),
          m_scaleWindow(nullptr)
@@ -355,12 +355,10 @@ MainWindow::MainWindow(QWidget *parent, Qt::WindowFlags fl)
    connect(chkGS1Parens, SIGNAL(toggled(bool)), SLOT(update_preview()));
    connect(chkGS1NoCheck, SIGNAL(toggled(bool)), SLOT(update_preview()));
    if (m_bc.bc.haveGS1SyntaxEngine()) {
-        m_chkGS1SyntaxEngine = new QCheckBox(tr("GS1 St&rict"));
-        m_chkGS1SyntaxEngine->setToolTip(tr("Use GS1 Syntax Engine to\n"
-                                              "strictly verify GS1 data\n"
-                                              "(ignored if disabled)"));
-        hLayoutChks->insertWidget(-1, m_chkGS1SyntaxEngine);
-        connect(m_chkGS1SyntaxEngine, SIGNAL(toggled(bool)), SLOT(update_preview()));
+        chkGS1Strict->show();
+        connect(chkGS1Strict, SIGNAL(toggled(bool)), SLOT(update_preview()));
+    } else {
+        chkGS1Strict->hide();
    }
    connect(spnWhitespace, SIGNAL(valueChanged(int)), SLOT(update_preview()));
    connect(spnVWhitespace, SIGNAL(valueChanged(int)), SLOT(update_preview()));
@@ -470,8 +468,8 @@ MainWindow::~MainWindow()
    settings.setValue(QSL("studio/chk_rinit"), chkRInit->isChecked() ? 1 : 0);
    settings.setValue(QSL("studio/chk_gs1parens"), chkGS1Parens->isChecked() ? 1 : 0);
    settings.setValue(QSL("studio/chk_gs1nocheck"), chkGS1NoCheck->isChecked() ? 1 : 0);
-    if (m_chkGS1SyntaxEngine) {
-        settings.setValue(QSL("studio/chk_gs1syntax"), m_chkGS1SyntaxEngine->isChecked() ? 1 : 0);
+    if (chkGS1Strict->isVisible()) {
+        settings.setValue(QSL("studio/chk_gs1strict"), chkGS1Strict->isChecked() ? 1 : 0);
    }
    settings.setValue(QSL("studio/appearance/autoheight"), chkAutoHeight->isChecked() ? 1 : 0);
    settings.setValue(QSL("studio/appearance/compliantheight"), chkCompliantHeight->isChecked() ? 1 : 0);
@@ -544,8 +542,8 @@ void MainWindow::load_settings(QSettings &settings)
    chkRInit->setChecked(settings.value(QSL("studio/chk_rinit")).toInt() ? true : false);
    chkGS1Parens->setChecked(settings.value(QSL("studio/chk_gs1parens")).toInt() ? true : false);
    chkGS1NoCheck->setChecked(settings.value(QSL("studio/chk_gs1nocheck")).toInt() ? true : false);
-    if (m_chkGS1SyntaxEngine) {
-        m_chkGS1SyntaxEngine->setChecked(settings.value(QSL("studio/chk_gs1syntax")).toInt() ? true : false);
+    if (chkGS1Strict->isVisible()) {
+        chkGS1Strict->setChecked(settings.value(QSL("studio/chk_gs1strict")).toInt() ? true : false);
    }
    chkAutoHeight->setChecked(settings.value(QSL("studio/appearance/autoheight"), 1).toInt() ? true : false);
    chkCompliantHeight->setChecked(
@@ -3362,8 +3360,8 @@ void MainWindow::update_preview()
    btnClearData->setEnabled(!txtData->text().isEmpty());
    chkGS1Parens->setEnabled(m_bc.bc.takesGS1AIData(m_symbology) || (m_bc.bc.inputMode() & 0x07) == GS1_MODE);
    chkGS1NoCheck->setEnabled(chkGS1Parens->isEnabled());
-    if (m_chkGS1SyntaxEngine) {
-        m_chkGS1SyntaxEngine->setEnabled(chkGS1Parens->isEnabled() && !chkGS1NoCheck->isChecked());
+    if (chkGS1Strict->isVisible()) {
+        chkGS1Strict->setEnabled(chkGS1Parens->isEnabled() && !chkGS1NoCheck->isChecked());
    }
    chkRInit->setEnabled(m_bc.bc.supportsReaderInit() && (m_bc.bc.inputMode() & 0x07) != GS1_MODE);
    chkCompliantHeight->setEnabled(m_bc.bc.hasCompliantHeight());
@@ -3386,8 +3384,8 @@ void MainWindow::update_preview()
    m_bc.bc.setECI(cmbECI->isEnabled() ? cmbECI->currentIndex() : 0);
    m_bc.bc.setGS1Parens(chkGS1Parens->isEnabled() && chkGS1Parens->isChecked());
    m_bc.bc.setGS1NoCheck(chkGS1NoCheck->isEnabled() && chkGS1NoCheck->isChecked());
-    if (m_chkGS1SyntaxEngine) {
-        m_bc.bc.setGS1SyntaxEngine(m_chkGS1SyntaxEngine->isEnabled() && m_chkGS1SyntaxEngine->isChecked());
+    if (chkGS1Strict->isVisible()) {
+        m_bc.bc.setGS1SyntaxEngine(chkGS1Strict->isEnabled() && chkGS1Strict->isChecked());
    }
    m_bc.bc.setReaderInit(chkRInit->isEnabled() && chkRInit->isChecked());
    m_bc.bc.setShowText(chkHRTShow->isEnabled() && chkHRTShow->isChecked());
--- a/frontend_qt/mainwindow.h
+++ b/frontend_qt/mainwindow.h
@@ -216,7 +216,6 @@ private:
    QGraphicsScene *scene;
    int m_symbology;
    QMenu *m_menu;
-    QCheckBox *m_chkGS1SyntaxEngine;
    QShortcut *m_saveAsShortcut;
    QShortcut *m_factoryResetShortcut;
    QShortcut *m_openCLIShortcut;
--- a/win32/README
+++ b/win32/README
@@ -1,4 +1,4 @@
-% win32/README 2025-09-12
+% win32/README 2025-09-16

 Visual Studio 2022
 ------------------
@@ -27,7 +27,7 @@ and cloning each:
  git clone https://git.code.sf.net/p/zint/code zint
  git clone https://git.code.sf.net/p/libpng/code lpng
  git clone https://github.com/madler/zlib.git zlib
-  git clone https://github.com/gs1/gs1-syntax-engine
+  git clone https://github.com/gitlost/gs1-syntax-engine

 First build zlib:

@@ -45,13 +45,9 @@ and then lpng:

 and then gs1encoders:

-  cd gs1-syntax-engine\src
-  msbuild /p:Configuration=Release;Platform=x86 gs1encoders.sln /t:gs1encoders
-  cd ..\..
-
-and add the location of gs1encoders.dll to your path:
-
-  set "PATH=%cd%\gs1-syntax-engine\src\c-lib\build\library\Win32\Release;%PATH%"
+  cd gs1-syntax-engine\src\c-lib
+  nmake -f makefile.vcwin32
+  cd ..\..\..

 If you now open "%cd%\zint\win32\zint.sln" with Visual Studio 2022, you
 should be able to build the Release configuration for Win32.
@@ -102,7 +98,11 @@ Visual Studio 2019 and 2017
 ---------------------------

 Solutions for Visual Studio 2019 and 2017 are in sub-directories vs2019 and
-vs2017. The steps are the same as for Visual Studio 2022.
+vs2017. The steps are the same as for Visual Studio 2022. Adjust for
+sub-directory when setting PATH:
+
+  set "PATH=%cd%\zint\win32\vs2019\Release;%PATH%"
+  set "PATH=%cd%\zint\win32\vs2017\Release;%PATH%"


 Visual Studio 2015
@@ -117,6 +117,9 @@ e.g. (adjust for version):

 Recent versions of Qt no longer supply a specific component for Visual Studio
 2015 32-bit, but you can use "MSVC 2019 32-bit" instead as it's compatible.
+Adjust for sub-directory when setting PATH:
+
+  set "PATH=%cd%\zint\win32\vs2015\Release;%PATH%"

 For information on building a standalone version of Zint Studio using Visual
 Studio 2015, see "frontend_qt\howto_build_qzint_using_msvs2015.txt"
@@ -134,17 +137,12 @@ CMake needs to be able to find zlib, lpng and gs1encoders. One way to do this
 (requires Administrator privileges) is to create two sub-directories in
 "C:\Program Files (x86)" called "include" and "lib", and then copy:

-  for %I in (zlib\zlib.h zlib\zconf.h ^
-    lpng\png.h lpng\pngconf.h lpng\pnglibconf.h ^
-	gs1-syntax-engine\src\c-lib\build\library\Win32\Release\gs1encoders.h) ^
-	do copy %I "C:\Program Files (x86)\include"
+  for %I in (zlib\zlib.h zlib\zconf.h lpng\png.h lpng\pngconf.h ^
+    lpng\pnglibconf.h gs1-syntax-engine\src\c-lib\gs1encoders.h) ^
+    do copy %I "C:\Program Files (x86)\include"
  for %I in (zlib\zlib.lib lpng\libpng.lib ^
-    gs1-syntax-engine\src\c-lib\build\library\Win32\Release\gs1encoders.lib) ^
-	do copy %I "C:\Program Files (x86)\lib"
-
-and add the location of gs1encoders.dll to your path:
-
-  set "PATH=%cd%\gs1-syntax-engine\src\c-lib\build\library\Win32\Release;%PATH%"
+    gs1-syntax-engine\src\c-lib\gs1encoders.lib) ^
+    do copy %I "C:\Program Files (x86)\lib"

 This example uses Qt 5.15.2 and component "MSVC 2019 32-bit" so install them and
 add to path (your path may differ):
@@ -178,7 +176,8 @@ equivalents are:
 Visual C++ 6
 ------------

-The zint library and command line tool can be built using VC6.
+The zint library and command line tool can be built using VC6 (but not with GS1
+Syntax Engine support).

 See "win32\zint_cmdline_vc6\readme.txt"

--- a/win32/libzint.vcxproj
+++ b/win32/libzint.vcxproj
@@ -19,14 +19,14 @@
  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
    <ConfigurationType>DynamicLibrary</ConfigurationType>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
    <CharacterSet>MultiByte</CharacterSet>
    <WholeProgramOptimization>false</WholeProgramOptimization>
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
    <ConfigurationType>DynamicLibrary</ConfigurationType>
    <CharacterSet>MultiByte</CharacterSet>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
  </PropertyGroup>
  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
  <ImportGroup Label="ExtensionSettings">
@@ -56,8 +56,8 @@
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..\zlib;..\..\lpng;..\..\gs1-syntax-engine\src\c-lib\build\library\Win32\Release;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\zlib;..\..\lpng;..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <MinimalRebuild>true</MinimalRebuild>
      <ExceptionHandling />
      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
@@ -76,9 +76,9 @@
      <LinkLibraryDependencies>false</LinkLibraryDependencies>
    </ProjectReference>
    <Link>
-      <AdditionalDependencies>libpng.lib;zlib.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>zlib.lib;libpng.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\lpng;..\..\zlib;..\..\gs1-syntax-engine\src\c-lib\build\library\Win32\Release;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\zlib;..\..\lpng;..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <IgnoreSpecificDefaultLibraries>libcmtd.lib;msvcrt.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
      <GenerateDebugInformation>true</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
@@ -90,8 +90,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\zlib;..\..\lpng;..\..\gs1-syntax-engine\src\c-lib\build\library\Win32\Release;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\zlib;..\..\lpng;..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling />
      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
@@ -109,9 +109,9 @@
      <LinkLibraryDependencies>false</LinkLibraryDependencies>
    </ProjectReference>
    <Link>
-      <AdditionalDependencies>libpng.lib;zlib.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>zlib.lib;libpng.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\lpng;..\..\zlib;..\..\gs1-syntax-engine\src\c-lib\build\library\Win32\Release;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\zlib;..\..\lpng;..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <GenerateDebugInformation>false</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
      <OptimizeReferences>true</OptimizeReferences>
--- a/win32/vs2015/libzint.vcxproj
+++ b/win32/vs2015/libzint.vcxproj
@@ -116,8 +116,8 @@
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";ZINT_NO_PNG;BUILD_ZINT_DLL;ZLIB_DLL;PNG_DLL;DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <MinimalRebuild>true</MinimalRebuild>
      <ExceptionHandling />
      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
@@ -138,7 +138,7 @@
    <Link>
      <AdditionalDependencies>%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zintd.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <IgnoreSpecificDefaultLibraries>libcmtd.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
      <GenerateDebugInformation>true</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
@@ -148,8 +148,8 @@
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
    <ClCompile>
      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>ZINT_NO_PNG;WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;ZLIB_DLL;PNG_DLL;DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <ExceptionHandling>
      </ExceptionHandling>
      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
@@ -171,7 +171,7 @@
    <Link>
      <AdditionalDependencies>zlibd.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zintd.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <IgnoreSpecificDefaultLibraries>libcmtd.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
      <GenerateDebugInformation>true</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
@@ -181,8 +181,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;ZLIB_DLL;PNG_DLL;ZINT_NO_PNG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling />
      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
@@ -200,9 +200,9 @@
      <LinkLibraryDependencies>false</LinkLibraryDependencies>
    </ProjectReference>
    <Link>
-      <AdditionalDependencies>libpng.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>zlib.lib;libpng.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <GenerateDebugInformation>false</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
      <OptimizeReferences>true</OptimizeReferences>
@@ -214,8 +214,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;ZINT_NO_PNG;ZLIB_DLL;PNG_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling>
      </ExceptionHandling>
@@ -236,9 +236,9 @@
      <LinkLibraryDependencies>false</LinkLibraryDependencies>
    </ProjectReference>
    <Link>
-      <AdditionalDependencies>libpng.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>zlib.lib;libpng.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <GenerateDebugInformation>false</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
      <OptimizeReferences>true</OptimizeReferences>
@@ -249,8 +249,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling />
      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
@@ -272,8 +272,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>NDEBUG;_LIB;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling>
      </ExceptionHandling>
--- a/win32/vs2017/libzint.vcxproj
+++ b/win32/vs2017/libzint.vcxproj
@@ -56,8 +56,8 @@
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <MinimalRebuild>true</MinimalRebuild>
      <ExceptionHandling />
      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
@@ -76,9 +76,9 @@
      <LinkLibraryDependencies>false</LinkLibraryDependencies>
    </ProjectReference>
    <Link>
-      <AdditionalDependencies>libpng.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>zlib.lib;libpng.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <IgnoreSpecificDefaultLibraries>libcmtd.lib;msvcrt.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
      <GenerateDebugInformation>true</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
@@ -90,8 +90,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling />
      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
@@ -109,9 +109,9 @@
      <LinkLibraryDependencies>false</LinkLibraryDependencies>
    </ProjectReference>
    <Link>
-      <AdditionalDependencies>libpng.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
+      <AdditionalDependencies>zlib.lib;libpng.lib;gs1encoders.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <GenerateDebugInformation>false</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
      <OptimizeReferences>true</OptimizeReferences>
--- a/win32/vs2019/libzint.vcxproj
+++ b/win32/vs2019/libzint.vcxproj
@@ -56,8 +56,8 @@
  <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'">
    <ClCompile>
      <Optimization>Disabled</Optimization>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;_DEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";DEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <MinimalRebuild>true</MinimalRebuild>
      <ExceptionHandling />
      <BasicRuntimeChecks>EnableFastChecks</BasicRuntimeChecks>
@@ -78,7 +78,7 @@
    <Link>
      <AdditionalDependencies>libpng.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <IgnoreSpecificDefaultLibraries>libcmtd.lib;msvcrt.lib;%(IgnoreSpecificDefaultLibraries)</IgnoreSpecificDefaultLibraries>
      <GenerateDebugInformation>true</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
@@ -90,8 +90,8 @@
    <ClCompile>
      <Optimization>MaxSpeed</Optimization>
      <IntrinsicFunctions>false</IntrinsicFunctions>
-      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_VERSION="2.15.0.9";BUILD_ZINT_DLL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;ZINT_HAVE_GS1SE;ZINT_VERSION="2.15.0.9";%(PreprocessorDefinitions)</PreprocessorDefinitions>
      <StringPooling>true</StringPooling>
      <ExceptionHandling />
      <RuntimeLibrary>MultiThreadedDLL</RuntimeLibrary>
@@ -111,7 +111,7 @@
    <Link>
      <AdditionalDependencies>libpng.lib;zlib.lib;%(AdditionalDependencies)</AdditionalDependencies>
      <OutputFile>$(OutDir)zint.dll</OutputFile>
-      <AdditionalLibraryDirectories>..\..\..\lpng;..\..\..\zlib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>..\..\..\zlib;..\..\..\lpng;..\..\..\gs1-syntax-engine\src\c-lib;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
      <GenerateDebugInformation>false</GenerateDebugInformation>
      <SubSystem>Windows</SubSystem>
      <OptimizeReferences>true</OptimizeReferences>
--- a/win32/zint.vcxproj
+++ b/win32/zint.vcxproj
@@ -19,7 +19,7 @@
  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
    <ConfigurationType>Application</ConfigurationType>
-    <PlatformToolset>v142</PlatformToolset>
+    <PlatformToolset>v143</PlatformToolset>
    <CharacterSet>MultiByte</CharacterSet>
    <WholeProgramOptimization>false</WholeProgramOptimization>
  </PropertyGroup>
@@ -104,4 +104,4 @@
  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
  <ImportGroup Label="ExtensionTargets">
  </ImportGroup>
-</Project>
+</Project>