Imports NETGeographicLib Module example_MagneticModel Sub Main() Try Dim mag As MagneticModel = New MagneticModel("wmm2010", "") Dim lat As Double = 27.99, lon = 86.93, h = 8820, t = 2012 ' Mt Everest Dim Bx, By, Bz As Double mag.Field(t, lat, lon, H, Bx, By, Bz) Dim bigH, F, D, I As Double MagneticModel.FieldComponents(Bx, By, Bz, bigH, F, D, I) Console.WriteLine(String.Format("{0} {1} {2} {3}", bigH, F, D, I)) Catch ex As GeographicErr Console.WriteLine(String.Format("Caught exception: {0}", ex.Message)) End Try End Sub End Module