调用DLL

显式调用：

 

//model.cpp

 

#include

extern "C" __declspec(dllexport)  void HelloWorld()
{
    AfxMessageBox("Hello World from DLL!\n",IDOK);
}

 

cl model.cpp /LD 生成 model.dll

 

Dev环境中的调用：

//main.cpp

#include
#include

int main(int argc, char *argv[])
{
    FARPROC p;
    HINSTANCE h = LoadLibraryA("model.dll");
    p=GetProcAddress(h,"HelloWorld");
    (*p)();
    FreeLibrary(h);
    system("PAUSE");
    return EXIT_SUCCESS;
}

 

编译后,把model.dll放到exe文件同目录下,运行即可.

 

VS环境下调用：

 

 

#include

void main()
{
HMODULE hm = LoadLibrary("model.dll");
FARPROC proc = GetProcAddress(hm,"HelloWorld");
proc();
FreeLibrary(hm);
}

 

cl main.cpp

 

C#的调用

 

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

 

namespace ConsoleApplication1
{
    class Program
    {
        [DllImport("model.dll")]
        static extern void HelloWorld();

        static void Main(string[] args)
        {
            HelloWorld();
            Console.Read();
           
        }
    }
}

 

csc Program.cs

_______________________________________________________________

 

隐式调用：

 

//aaa.def

LIBRARY "aaa"
EXPORTS
 hi;

 

//aaa.cpp

#include "aaa.h"

void hi()
{
 cout<<"hello"<}

 

//aaa.h

#include
using namespace std;

void hi();

 

编译成DLL和LIB文件

cl aaa.cpp aaa.def /LD

============================================

 

//bbb.cpp

#include
#include "aaa.h"

 

#pragma comment(lib,"aaa.lib")

void main()
{
 hi();
 system("PAUSE");
}

 

工程中添加DEF文件和H文件，LIB文件放到工程目录下，把DLL放到EXE文件目录下