First, The dashboard info is preset by IFI. It contains all 16 PWM values, several user bytes(you can assign these your own info(spike state)), and other info.
The dashboard port also has two different modes, set by the jumper by the port. In OI mode the dashboard data includes the state of all inputs for the joysticks. In RC mode it has the info I mentioned above.
Why do you want to use Labview?
You may want to look into
seanwitte's dashboard viewer. It is written in .net 2, and you can write new views for it in C# or VB.net.
Another option is
IFI dashboard viewer. It is very limited compared to seanwitte's.
The specifications for the dashboard communications should be included in either of the downloads I mentioned.
Hope this helps,
Eric Haskins