using System;

using System.Runtime.InteropServices;

​

namespace ConsoleApplication1

{

    public sealed class MyUtil : IDisposable

    {

        [DllImport("HSdll.dll", CallingConvention = CallingConvention.Cdecl)]

        private static extern void hs_init(IntPtr argc, IntPtr argv);

​

        [DllImport("HSdll.dll", CallingConvention = CallingConvention.Cdecl)]

        private static extern void hs_exit();

​

        [DllImport("HSdll.dll", CallingConvention = CallingConvention.Cdecl)]

        private static extern void getPoint(ref MyPoint mp);

​

        [DllImport("HSdll.dll", CallingConvention = CallingConvention.Cdecl)]

        private static extern int getArrlength();

​

        [DllImport("HSdll.dll", CallingConvention = CallingConvention.Cdecl)]

        private static extern void getArr([In, Out] MyPoint[] mpa);

​

        public MyUtil()

        {

            Console.WriteLine("Initialising DLL...");

            hs_init(IntPtr.Zero, IntPtr.Zero);

        }

​

        public void Dispose()

        {

            Console.WriteLine("Shutting down DLL...");

            hs_exit();

        }

​

        public MyPoint GetPoint()

        {

            MyPoint mp = new MyPoint();

            Console.WriteLine(string.Format("Calling getPoint..."));

            getPoint(ref mp);

            return mp;

        }

​

        public MyPoint[] getArray()

        {

​

            int size = getArrlength();

            MyPoint[] mpa = new MyPoint[size];

            for (int i = 0; i < size; i++)

            {

                mpa[i] = new MyPoint();

            }

​

            getArr(mpa);

            return mpa;

        }

    }

​

    [StructLayout(LayoutKind.Sequential, Size = 8)]

    public struct MyPoint

    {

        public Int32 numberx;

        public Int32 numbery;

    }

​

    public class Foo1

    {

        public static void Main()

        {

            using (var mu = new MyUtil())

            {

                MyPoint mp = mu.GetPoint();

                Console.WriteLine("numberx: {0}, numbery: {1}", mp.numberx, mp.numbery);

​

                MyPoint[] mpa = mu.getArray();

                foreach (var item in mpa)

                {

                    Console.WriteLine("Numx {0} ,   Numy {1}", item.numberx, item.numbery);

                }

            }

            Console.Read();

        }

    }

}