How can I add a substance plugin into UE4.9 source code

I copied the entire folders and files of substance plugin into 4.9.0\Engine\Plugins
but I still can not find the substance plugin in my explorer directory of ue4 engine in vs2013.
I want to know how can build substance plugin in the source code engine

Hi,

Run again the generateProjectFiles.bat file in order to refresh the visual studio solution.

thank you very much

Thanks a lot!

Thank you : )