DLL初试

环境: VC++6.0

步骤:

1.建立一个WIN32 DYNAMIC-LINK LIBRARY工程,编写CPP文件,文件内容例如:

#include "stdafx.h"
#include "windows.h"
#include "dll.h" 
BOOL APIENTRY DllMain( HANDLE hModule, DWORD ul_reason_for_call, LPVOID lpReserved )
{
    return TRUE;
}
extern"C"_declspec(dllexport)int sum(int a, int b) { return a+b; }

2.记得编写头文件,在本次事例中,头文件为dll.h,内容:

 extern"C"_declspec(dllexport) int sum(int a,int b); 

3.进行编译连接,本过程可能回有点(相当)曲折.编译连接OK,生成*.dll *.lib 这两个文件便可用了.

(静态调用)测试:

创建一个WIN32 CONSOLE APPLICATION,编写CPP代码例如:

// dllTest.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <stdio.h>
extern"C"_declspec(dllexport) int sum(int a,int b);
#pragma comment (lib,"dll")
int main(int argc, char* argv[])
{
    printf("%d\r\n",sum(2,4));

    return 0;
}

编译连接即可.(记得将*.LIB *.DLL复制到测试的工程目录下)

(动态调用)测试:

#include "stdafx.h"
#include <Windows.h>
#include <stdio.h>

typedef int(*dllSum)(int,int);
int main(int argc, char* argv[])
{
    HMODULE hModule=LoadLibrary("dll.dll");
    dllSum sum=(dllSum)GetProcAddress(hModule,"sum");

    printf("%d\r\n",sum(2,22));
    return 0;
}