Yes we have a basic example for the PL1000 series units (32-bit), see attachment.
You will also need to download and install the 32-bit SDK https://www.picotech.com/downloads
We don't have VB.net example, you can run the C# code above through a conversion tool to get VB.net code.
Like this one- http://www.developerfusion.com/tools/convert/vb-to-csharp/
Also look at our Excel example in the SDK, which has more functionality.