how to add the dynamic link library in vs2005

there are many advantages to use the dynamic link library when we develop the software by C plus plus, here i just say something about how to generate a dll and how to use it in a project.

Though windows via c/c++ and vc++ deeply programming by sun xin had describe more about this, here I just want to highlight one point. Meanwhile, I will use the exmple of the book written by Sunxin.

1, create the Dill project:

Dill.h file:

#ifdef DLL1_API

#else

#define DLL1_API extern "C" _declspec (dllimport)

#endif

DLL1_API int add(int a, int b);

DLL1_API int substract(int a, int b);

 

2, create dill.cpp :

#define DLL1_API extern "C" _declspec (dllexport)

 #include "Dill.h"

 int add(int a, int b)

{

return a + b;

}

 

int substract( int a, int b)

{

return a - b;

}

3, create dill test project with MFC fram

 

HINSTANCE hInst;

hInst = LoadLibrary("Dill.dll");

typedef int (*ADDPROC)(int a, int b);

ADDPROC Add = (ADDPROC)GetProcAddress(hInst, "add");

if(!Add)

{

MessageBox("Error!");

return;

}

CString str;

str.Format("5+3= %d", Add(5,3));

MessageBox(str);

 

4,move the Dill.h file to the dilltest project.

5, move the dill.dll and dill.lib file to the dilltest project.

5,build the dilltest project, if no exception, I think the build can pass.