将《C# 调用非托管程序》一文中最后一种方法修改如下(篇幅原因简化了注释)：

/*修改记录2008-5-11 8:07 曲滨 基本实现预期功能[!] 明天进行优化2008-5-12 15:54 曲滨[E] 优化完成[N] 加入 NativeCodeHelper 类便于使用2010-6-17 周振兴修改兼容性可在开启DEP及Vista/Win7中运行。*/namespace NShellNativeCode{using System;using System.Runtime.InteropServices;delegate int AddProc(int p1, int p2);class Program{static void Main(string[] args){byte[] codeBytes {0x8B, 0x44, 0x24, 0x08 // mov eax,[esp08h], 0x8B, 0x4C, 0x24, 0x04 // mov ecx,[esp04h], 0x03, 0xC1 // add eax,ecx, 0xC3 // ret};/*上面的字节数组就是下面函数的本机代码int add(int x,int y) {return xy;}*/IntPtr handle IntPtr.Zero;handle VirtualAlloc(IntPtr.Zero,codeBytes.Length,MEM_COMMIT | MEM_RESERVE,PAGE_EXECUTE_READWRITE);try{Marshal.Copy(codeBytes, 0, handle, codeBytes.Length);AddProc add Marshal.GetDelegateForFunctionPointer(handle, typeof(AddProc)) as AddProc;int r add(1976, 1);Console.WriteLine(本机代码返回:{0}, r);}finally{VirtualFree(handle, 0, MEM_RELEASE);}Console.ReadLine();}//Windows API[DllImport(Kernel32.dll, EntryPoint VirtualAlloc)]public static extern IntPtr VirtualAlloc(IntPtr address, int size, uint allocType, uint protect);[DllImport(Kernel32.dll, EntryPoint VirtualFree)]public static extern bool VirtualFree(IntPtr address, int size, uint freeType);//flagsconst uint MEM_COMMIT 0x1000;const uint MEM_RESERVE 0x2000;const uint PAGE_EXECUTE_READWRITE 0x40;const uint MEM_RELEASE 0x8000;}}