Add project files.

CoordinateConverterUtilities.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GpsClient2 {
+    internal class CoordinateConverterUtilities {
+#if WIN64
+        private const string DllImport = @"plugins/ETRS89_LAMBERT_UTM_64bits.dll";
+#else
+        private const string DllImport = @"plugins/ETRS89_LAMBERT_UTM_32bits.dll";
+#endif
+
+        #region Coordinate conversion functions using NGI DLL
+
+        //Import the dll with the functions to calculate lambert coordinates
+        [DllImport(DllImport, SetLastError = true, CharSet = CharSet.Auto)]
+        public static extern int GeoETRS89ToLambert72(double Xi, double Yi, double Zi, ref double xo, ref double yo, ref double Ho);
+
+        [DllImport(DllImport, SetLastError = true, CharSet = CharSet.Auto)]
+        public static extern int Lambert72ToLambert08(double Xi, double Yi, double Zi, ref double xo, ref double yo, ref double Ho);
+
+        [DllImport(DllImport, SetLastError = true, CharSet = CharSet.Auto)]
+        public static extern int Lambert72ToGeoETRS89(double Xi, double Yi, double Zi, ref double xo, ref double yo, ref double Ho);
+
+        #endregion
+    }
+}