vc++6.0 creation and invocation of dynamic libraries (non-MFC DLLs)

Creation of non-MFC dynamic libraries ...

A lib.cpp, a lib.h.

/*lib.h*/  #ifndef lib_h  #define LIB_H    //declares the export function of add as DLL.  extern "C" int _declspec (dllexport) Add (int x,int y);  #endif  

You can also add def files

; Lib.def: Export DLL function         library Dlltestdef      Exports     add @ 1  

　　

Calls to non-MFC dynamic libraries

1. Static Calls

Static call DLL dynamic library, the DLL and LIB files have been placed under the corresponding working path  #include <stdio. h>  #pragma comment (lib, "DllTEST.lib")//. Tells the compiler where to put the Lib file associated with the DLL.    extern "C" _declspec (dllimport) Add (int x,int y);//Declaration import Function    int main ()  {      int result=add (2,3);      printf ("2+3=%d \ n", result);            return 0;  }  

2. Dynamic invocation

Dynamic Call DLL dynamic-link library.  Just put the DLL in the appropriate working directory to  #include <stdio.h>  #include <windows.h>  // Defines a function pointer type that is the same as the add function parameter type and the return pointer type.  The  typedef int (*lpaddfun) (int,int) is then instantiated in the main function;//macro definition function pointer type    int main ()  {      hinstance hdll;//dll handle      Lpaddfun addfun;//Instantiates the function pointer type      hdll=loadlibrary ("./dlltest.dll") above, and//dynamically loads the DLL module and assigns the module handle of the DLL to hDLL.      if (hdll!=null)      {          addfun= (lpaddfun) GetProcAddress (hDLL, "add"),//The address of the Add function in the DLL module is given to Addfun          if ( Addfun!=null)          {              int result=addfun (2,3);//Addfun to invoke the Add function                            printf ("2+3=%d \ n", result);          }                    FreeLibrary (hdll);//unload DLL dynamic module      }         return 0;        

　　

　　

vc++6.0 creation and invocation of dynamic libraries (non-MFC DLLs)