Tested with Graphviz version 2.24,2.26.3 Install graphviz and include C:\Program Files\Graphviz\bin into PATH or just copy graphviz dll's into project output directory, required dll's: cdt.dll graph.dll gvc.dll gvcplugin_core.dll gvcplugin_dot_layout.dll libexpat.dll ltdl.dll Pathplan.dll regex_win32.dll and with dll's required configuration file "config6"(see config6.sample) GraphVizNet is Visual C++ 2008 project, if you don't have installed Visual C++, use precompiled version of GraphVizNet.dll in "Precompiled" folder. Add C:\Program Files\Graphviz\include\graphviz to include search path and C:\Program Files\Graphviz\lib\release\lib to library search path(Tools->Options->Projects and Solutions->VC++ Directories).