Open CASCADE Technology: Building with MS Visual C++


Open CASCADE Technology  7.2.0
Building with MS Visual C++


This page describes steps to build OCCT libraries from a complete source archive on Windows with MS Visual C++ using projects generated by genproj tool. It is an alternative to use of CMake build system (see Building with CMake).

genproj is a legacy tool (originated from command "wgenproj" in WOK) for generation of Visual Studio, Code.Blocks, and XCode project files used for building Open CASCADE Technology. These project files are placed inside OCCT directory (in adm subfolder) and use relative paths, thus can be moved together with sources.

The project files included in official distribution of OCCT are generated by this tool. If you have official distribution with project files included, you can use them directly without a need to call genproj.

Third-party libraries

Before building OCCT, make sure to have all the required third-party libraries installed.

The easiest way to install third-party libraries is to download archive with pre-built binaries, corresponding to version of Visual Studio you are using, from

You can also build third-party libraries from their sources, see Building 3rd-party libraries on Windows for instructions.


If you have Visual Studio projects already available (pre-installed or generated), you can edit file custom.bat manually to adjust the environment:

  • VCVER – specification of format of project files, defining also version of Visual Studio to be used, and default name of the sub-folder for binaries:
VCVER Visual Studio version Windows Platform Binaries folder name
vc10 2010 (10) Desktop (Windows API) vc10
vc11 2012 (11) Desktop (Windows API) vc11
vc12 2013 (12) Desktop (Windows API) vc12
vc14 2015 (14) Desktop (Windows API) vc14
vc14-uwp 2015 (14) UWP (Universal Windows Platform) vc14-uwp
vc141 2017 (15) Desktop (Windows API) vc14
vc141-uwp 2017 (15) UWP (Universal Windows Platform) vc14-uwp
  • ARCH – architecture (32 or 64), affects only PATH variable for execution
  • HAVE_* – flags to enable or disable use of optional third-party products
  • CSF_OPT_* – paths to search for includes and binaries of all used third-party products
  • SHORTCUT_HEADERS – defines method for population of folder inc by header files. Supported methods are:
    • Copy - headers will be copied from src;
    • ShortCut - short-cut header files will be created, redirecting to same-named header located in src;
    • "HardLink* - hard links to headers located in src will be created.

Alternatively, you can launch genconf, a GUI tool allowing to configure build options interactively. That tool will analyze your environment and propose you to choose available options:

  • Version of Visual Studio to be used (from the list of installed ones, detected by presence of environment variables like VS100COMNTOOLS).
  • Method to populate folder inc (short-cuts by default).
  • Location of third-party libraries (usually downloaded from OCCT web site, see above).
  • Path to common directory where third-party libraries are located (optional).
  • Paths to headers and binaries of the third-party libraries (found automatically basing on previous options; click button "Reset" to update).
  • Generation of PDB files within Release build ("Release with Debug info", false by default).

Click "Save" to store the specified configuration in custom.bat file.

Projects generation

Launch genproj to update content of inc folder and generate project files after changes in OCCT code affecting layout or composition of source files.

To use genproj and genconf tools you need to have Tcl installed and accessible by PATH. If Tcl is not found, the tool may prompt you to enter the path to directory where Tcl can be found.
$ genproj.bat

Note that if custom.bat is not present, genproj will start genconf to configure environment.


Launch msvc.bat to start Visual Studio with all necessary environment variables defined, and build the whole solution or required toolkits.

Note: the MSVC project files are located in folders adm\msvc\vc.... Binaries are produced in win32 or win64 folders.

To start DRAW, launch draw.bat.

Generated on Wed Aug 30 2017 17:04:22 for Open CASCADE Technology by   doxygen 1.8.13