wolffd@0: function gvizPath = setupPath()
wolffd@0: % Attempt to add GraphViz to the system path, (temporariliy within the
wolffd@0: % matlab session only). 
wolffd@0:     gvizPath = 'unknown';
wolffd@0:     if ~ispc()
wolffd@0:         return
wolffd@0:     end
wolffd@0:     try  %#ok
wolffd@0:         gvizPath = winqueryreg('HKEY_LOCAL_MACHINE','SOFTWARE\AT&T Research Labs\Graphviz', 'InstallPath');
wolffd@0:         addtosystempath(fullfile(gvizPath, 'bin'));
wolffd@0:     end
wolffd@0: end