The code in the roboRIO, NetworkCommunications task, that connects the robot to the Driver Station is the same for any language running on the robot.
When you see the "Communications" indicator turn from red to green on the field, that means that the Driver Station has connected with the robot. Then a few seconds later, the "Robot Code" turns green indicating that the code is advertising that it's running.
This page:
https://wpilib.screenstepslive.com/s...-by-ni-labview
describes those indicators.