Building and installing what exactly ?

@vishnu May be you should have a look at its API. https://codex.wordpress.org/WordPress_APIs https://developer.wordpress.com/docs/api/

@Matty I'm running into this now. Were you able to find a solution?

@pankaj4288 Can you send data from c++ object back to html/js? If so, do you have suggestion on what should be done different in my question here ... with that code I an unable to get variables in html/js.