I'm going to go out on a limb here and make a wild assumption.
You are trying to use the skeleton face tracking, right? So, because there is a C# example, you coded that up and got it working. Now you have some C# code that gets data from the SDK API, but want to get it into LabVIEW somehow. Am I close?
Well. I think you have made things a little bit hard for yourself because you used C#. LabVIEW can interface directly with the API and you can use the callback function (.NET callback) to get the data into LabVIEW directly without jumping through hoops. The issue is you have isolated the data in your own monolithic program and now have to use some tricks that are quite advanced to get from there into LabVIEW. So you either write some C# code to re-transmit the events through your code to LabVIEW (which we have talked about, but isn't trivial) or just access the events directly and not bother with the C#.
The SDK has the event KinectSensor.AllFramesReadyEvent. You should be able to hook that directly with the .NET callback and therefore you don't need to write your own events or messages in C# for LabVIEW (there are examples shipped with LabVIEW for demonstrating the callback - NET Event Callback for Calendar Control VI in \examples\comm\dotnet\Events.llb and NET Event Callback for DataWatcher VI in labview\examples\comm\dotnet\Events.llb).