c#调用c++写成的dll文件

c#调用c++写成的dll文件2011-01-29virus首先是c++写的声明文件

// Inclusion guard
#ifndef _DLLTUT_DLL_H_
#define _DLLTUT_DLL_H_
// Make our life easier, if DLL_EXPORT is defined in a file then DECLDIR will do an export
// If it is not defined DECLDIR will do an import
#if defined DLL_EXPORT
#define DECLDIR __declspec（dllexport）
#else
#define DECLDIR __declspec（dllimport）
#endif
// Specify "C" linkage to get rid of C++ name mangeling
extern "C"
{
  // Declare 2 functions
  DECLDIR int Add（ int a, int b ）;
  DECLDIR void Function（ void ）;
}
// End the inclusion guard
#endif

测试程序的目录结构

测试代码c#

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
namespace ConsoleApplication30
{
  class Program
  {
    static void Main（string[] args）
    {
      test.Function（）;
      Console.WriteLine（"result: " + test.Add（2, 3）.ToString（））;
      Console.ReadLine（）;
    }
  }
  class test
  {
    [DllImport（"..\..\lib\DLLTest.dll"）]
    public static extern void Function（）;
    [DllImport（"..\..\lib\DllTest.dll"）]
    public static extern int Add（int i,int j）;
  }
}