Unmanged to managed

Hello Alan ,

Thanks a lot for your reply .

Not exactly what i wanted . I have a unmanaged C++ class and i am creating a wrapper class for it , where one of my function takes a parameter as        (const char *s) ex :-

func(const char *s){ } . The wrapper what i have created is a dll application and when i import the dll into my c# application the signature changes to

func (sbyte*), whereas i need something like func(string) in my c# application...Hope it clarifies the problem .

If I've understood that correctly, it looks like you're going to have to convert a managed string to an sbyte* before you can call the unmanaged function from C#. This short program illustrates the principle:

using System;

unsafe class Program
{
   static void Main()
   {
       string s = "Hello"; // needs to be plain ascii chars 0 - 127
       sbyte[] sba = new sbyte[s.Length + 1]; // including final null byte       
       for(int i = 0; i < s.Length; i++)
       {
          sba[i]  = (sbyte)s[i];
       } 

       fixed(sbyte* sbp = sba)
       {
          Func(sbp);
       }

       Console.WriteLine();
       Console.ReadLine();
   }

   static void Func(sbyte* sbp)
   {
       int count = 0;
       while(sbp[count] != 0) Console.Write((char)sbp[count++]);
   }
      
}