There are several ways to communicate with the FieldPoint. The most common method would be to use shared variables, but direct TCP/IP communication is also available to you.
Let us know how things progress!
You don't need to:
In your case, I believe you will be able to write this code in C. When you install the FieldPoint software, a LabWindows/CVI Instrument driver for FieldPoint is installed if LabWindows/CVI has already been installed on your computer. This includes functions panels to call C functions that directly access the I/O items you configure in the FieldPoint Explorer program. In addition, examples are placed in your LabWindows/CVI samples directory and will be your best way to familiarize yourself with these functions.
Hope that helps,