The Visionary Render programming guide helps you get started with scripting against the Visionary Render Event and Plugin APIs. The guide contains an API reference as well as snippets and examples of common uses of the APIs.
You can access the guide online here: https://virtalis.github.io/developer/
The programming guide is also included with every install of Visionary Render for offline use. It can be found either
C:\Virtalis\Visionary Render <Version>\data\vrtreesdk\doc\html\index