Passing data from javascript plugin to c++ plugin for adobe acrobat

[Anoop27783580acgp]

I have 2 plugins, one written in C++ which does some processing of the document and one written in JavaScript which opens a modal with textbox and a button, where the user can enter some information and press OK. Is there a way to either - 

1. Store it in some default location from where the C++ plugin can read that information (or)

2. Pass this information directly to the C++ plugin.

This is for Adobe Acrobat Pro and not for reader.

[Test Screen Name]

Probably better to stick to one API. Do the UI in C++.