Our Socket API automation utility allows for a VB.NET application to control Logic. In general, the API is agnostic to language, and any language that can open up a TCP/IP socket can interact with Logic.
Unfortunately, we don't have a library available for VB.NET, but we do provide libraries for Python and C# which could be ported to VB.NET. The Python and C# libraries can be found below.
When data graphs are required, Matlab is generally recommended for ease-of-use and can generally save you several lines of code when compared to VB.NET. An open-source equivalent of Matlab, called Octave, has similar plotting capabilities.