using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsFormsApplication3//测试程序
{
   
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {


         int ret= mycl.test(testarr.arr);
            for (int k = 0; k < testarr.arr.Length; ++k)
            {
                textBox1.Text = textBox1.Text + testarr.arr[k].ToString();
            }


          public class mycl
           {
            [DllImport("testdll.dll")]
             public static extern int test(int[] arr);
//testdll为c++写的win32 dll,里面有个test函数，对传入的数组进行初始化
           }

         public class testarr 
        {
           public unsafe static int[] arr = new int[100];
         }
       
      
}

unsafe struct testarr
{
    public fixed int arr[32];  //请留意括号'[]'的位置
}