System::SharedPtr<Project> project = System::MakeObject<Project>(dataDir + u"CreateProject2.mpp");
System::SharedPtr<HtmlSaveOptions> option = System::MakeObject<HtmlSaveOptions>();
project->Save(dataDir + u"SaveProjectDataAsHTML_out.html", option);
    
// OR
    
// Adding only one page (page number 2)
option = System::MakeObject<HtmlSaveOptions>();
option->get_Pages()->Add(2);
project->Save(dataDir + u"SaveProjectDataAsHTML2_out.html", option);