Hi Gregg,
I suggest you use the EyeX SDK for .NET and check out the corresponding MinimalGazeDataStream sample. The sample uses EyeX Framework for .Net which is included as source code in the SDK (and sample solution). The EyeX Framework makes integrating with the EyeX C API much easier, with a dedicated .NET language binding and ready made features following the paradigms of the .NET Framework, including integrations into WinForms and WPF.