sscanf (msvcrt40.dll)

Program.cs

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

namespace ConsoleApp1
{
    class Program
    {
        [DllImport("msvcrt40.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int sscanf(string str, string format, __arglist);

        static void Main(string[] args)
        {
            var enc = Encoding.Default;
            var buf1 = new byte[100];
            var buf2 = new byte[100];
            int int1, int2;
            Console.WriteLine(sscanf("hello world! 123456789 987654321", "%s %s %d %d", __arglist(buf1, buf2, out int1, out int2)));
            Console.WriteLine(enc.GetString(buf1, 0, Array.IndexOf(buf1, (byte)0))); // hello
            Console.WriteLine(enc.GetString(buf2, 0, Array.IndexOf(buf2, (byte)0))); // world!
            Console.WriteLine(int1); // 123456789
            Console.WriteLine(int2); // 987654321
        }
    }
}