VS2010 writes DLL and unit test of dynamic link library, and transfers the correctness of DLL test

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This article will create a simple dynamic library -link, Compose console applications use the DLL , The DLL is “JAVA Call DLL DLL And JNative Study ” Used in DLL, It's just that the project and the file name are different .

Create a dynamically linked library project ： 1、 open Microsoft Visual Studio 2010, Select File -> newly build -> project .

2、 Select another language in the new project form ->Visual C++->Win32.

3、 choice Win32 project , Set the name ：simpleDLL. Set the solution name ：simpleDLL. 4、 Click OK . In the presence of Win32 Click next in the overview dialog box of the application wizard .

5、 In application settings , Select DLL.

6、 Check the blank item under the additional option . 7、 Click Finish to create the project . Add classes to the dynamic link library ： 1、 Add a new class header . Right click simpleDLL project , Join in -> New item , Select header file (.h), Set the name to simpleDLL, Click join .

2、 Add a new class source file . Right click simpleDLL project , Join in -> New item , choice C++ file (.cpp), Set the name to simpleDLL. Click join .

3、 Add content to the new class . The content is as follows ：

The header file simpleDLL.h：

//------------------ SimpleDLL.h ----------------

#pragma once;

// The macro ends in dll Project internal use __declspec(dllexport) export 
// stay dll When used outside the project . use __declspec(dllimport) Import 
// macro DLL_IMPLEMENT stay SimpleDLL.cpp In the definition of 
#ifdef DLL_IMPLEMENT
#define DLL_API __declspec(dllexport)
#else
#define DLL_API __declspec(dllimport)
#endif
DLL_API int add(int x, int y); // Simple method 
DLL_API const wchar_t* getPlayUrl(const wchar_t* mgrIp, long mgrPort, long materialId);
DLL_API const char* getUrl(const char* mgrIp, long mgrPort, long materialId);

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Source file simpleDLL.cpp:

//------------------ SimpleDLL.cpp ----------------

// Note that the macro definition here needs to be written in #include "SimpleDLL.h" Before 
// End in dll Project internal use __declspec(dllexport) export 
// stay dll When used outside the project , use __declspec(dllimport) Import 
#define DLL_IMPLEMENT

#include "SimpleDLL.h"
#include<Windows.h>
#include <intrin.h>
#include <stdlib.h>
#include <string.h>

int DLL_API add(int x, int y)
{
	return x+y;
}

DLL_API const wchar_t* getPlayUrl(const wchar_t* mgrIp, long mgrPort, long materialId)
{
	static wchar_t url[260] = { 0 };
	wcscpy_s(url, L"http:// chinese ");
	wcscat_s(url, mgrIp);
	wcscat_s(url, L":");
	wchar_t szPort[20] = { 0 };
	_ltow_s(mgrPort, szPort, 10);
	wcscat_s(url, szPort);
	return url;
}

DLL_API const char* getUrl(const char* mgrIp, long mgrPort, long materialId)
{
	static char url[260] = { 0 };
	strcpy_s(url, "http:// chinese ");
	strcat_s(url, mgrIp);
	strcat_s(url, ":");
	char szPort[20] = { 0 };
	_ltoa_s(mgrPort, szPort, 10);
	strcat_s(url, szPort);
	return url;
}

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Create applications that reference dynamic link libraries ： 1、 Right click the solution -> Join in -> New projects .

2、 Choose another language when adding a new project ->Visual C++->Win32.

3、 choice Win32 Console Application . Set the name ：simpleDLLTest.

4、 Click OK . In the presence of Win32 Click next in the overview dialog box of the application wizard .

5、 In application settings . Select console application under application type .

6、 Click Finish to create the project .

Use the functions of the class library in the console application ： 1、 by SimpleDLLTest.cpp Add content .

As you can see below ：

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

#include "stdafx.h"
#include "../SimpleDLL/SimpleDLL.h" // Add header file reference 
#pragma comment(lib, "..\\..\\SimpleDLL\\Release\\SimpleDLL.lib") // Join in lib File reference  
#include <process.h>
#include <locale.h>

int _tmain(int argc, _TCHAR* argv[])
{
	setlocale(LC_ALL, "chs"); // Configure localized information in simplified Chinese , Otherwise, the printed Chinese is garbled 
	wprintf(L"getPlayUrl: %s\r\n", getPlayUrl(L"127.0.0.1", 10087, 1));

	printf("getUrl: %s\r\n", getUrl("127.0.0.1", 10087, 1));
	system("pause");
	return 0;
}

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2、 quote simpleDLL project .

Right click SimpleDLLTest project . Select project dependencies .

3、 Depend on the check in the form SimpleDLL. Click OK .

4、 Set up SimpleDLLTest The project is an active project . Right click SimpleDLLTest project , Select set as startup project .

6、 Generate solutions .

Debug The execution results are as follows ：

Be careful ： Created today DLL Only by c++ call ,C Language and other languages cannot be called ！

Let's take a look with tools , Right click the solution . stay Windows Open the directory in Explorer

What I compiled is Release Version number , So open Release Catalog , find SimpleDLL.dll file . use Depends Tools To open it

The currently compiled version number is correct MSVCR100.DLL And dependence . In this way, it is copied to other devices without installation VS2010 You can't use it on your computer ;

Right click the item , attribute ：

Select general in the configuration properties on the left . Find... On the right MFC Use , Choose to use... In a static library MFC

Here are the changes MFC Use . There is another way ：vs2010 Remove when publishing msvcp100.dll and msvcr100.dll Picture explanation

Let's look at functions , With some special characters . such c++ Other languages cannot be called ; We need to add extern “C” sign , The code is as follows ：

//------------------ SimpleDLL.h ----------------

#pragma once;

// The macro ends in dll Project internal use __declspec(dllexport) export 
// stay dll When used outside the project . use __declspec(dllimport) Import 
// macro DLL_IMPLEMENT stay SimpleDLL.cpp In the definition of 
#ifdef DLL_IMPLEMENT
#define DLL_API __declspec(dllexport)
#else
#define DLL_API __declspec(dllimport)
#endif
extern "C" DLL_API int add(int x, int y); // Simple method 
extern "C" DLL_API const wchar_t* getPlayUrl(const wchar_t* mgrIp, long mgrPort, long materialId);
extern "C" DLL_API const char* getUrl(const char* mgrIp, long mgrPort, long materialId);

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Compile again , Again use Depends Tool open it , It can be found that the dependencies have disappeared . The function name is also normal ：

Refer to ： rehearse ： Create and use dynamic link libraries (C++)

Solution: download the source code ：http://download.csdn.net/detail/testcs_dn/7411383

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