[Solved] C unsigned char ** and unsigned long * to C#

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Try Following :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace ConsoleApplication49
{
    class Program
    {
        [DllImport("XXXXX.dll", CallingConvention = CallingConvention.Cdecl)]
        public static extern int Compress(int compressLevel, IntPtr srcBuf, IntPtr outBuf, IntPtr size);   

        static void Main(string[] args)
        {
            int compressLevel = 0;
            string input = "The quick brown fox jumped over the lazy dog";
            IntPtr srcBuf = Marshal.StringToBSTR(input);
            IntPtr outBuf = IntPtr.Zero;
            IntPtr size = Marshal.AllocHGlobal(sizeof(long));
            int results =  Compress(compressLevel, srcBuf, outBuf, size);

            string output = Marshal.PtrToStringAnsi(outBuf);
            long longSize = Marshal.ReadInt64(size);
        }
    }
}

7

solved C unsigned char ** and unsigned long * to C#