If you are starting with Rpv you should see this video. A little more complete than the Hello World, this one works with a database and generate a report from VB6.
We use Visual Basic because we believe that everybody understands it. Maybe you do not work on Visual Basic, but the syntax is so simple that can be understood by any programmer.
The video is subtitled and can be translated to any language. Please check the tools of youtube
You can download the example on this video from here.
Download this file and unpack it to c:\testrpv.