Salve,sto provando a creare una dll,il codice dovrebbe solo dire "hello world",ma mi da i seguenti errori di compilazione:
codice:
E:\Cpp\Sys64\main.cpp|7|error: function 'void HelloWorld()' definition is marked dllimport|
E:\Cpp\Sys64\main.cpp||In function 'void HelloWorld()':|
E:\Cpp\Sys64\main.cpp|7|warning: 'void HelloWorld()' redeclared without dllimport attribute: previous dllimport ignored|
||=== Build finished: 1 errors, 1 warnings ===|
Questo è il codice della main:

codice:
/* Replace "dll.h" with the name of your header */
#include "dll.h"
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>

DLLIMPORT void HelloWorld ()
{
   MessageBox (0, "Hello World from DLL!n", "Hi", MB_ICONINFORMATION);
}


BOOL APIENTRY DllMain (HINSTANCE hInst     /* Library instance handle. */ ,
                      DWORD reason        /* Reason this function is being called. */ ,
                      LPVOID reserved     /* Not used. */ )
{
   switch (reason)
   {
     case DLL_PROCESS_ATTACH:
       MessageBox(0, "Hello world!!!!", "DLL Loaded", MB_OK);         return TRUE;

     case DLL_PROCESS_DETACH:
       break;

     case DLL_THREAD_ATTACH:
       break;

     case DLL_THREAD_DETACH:
       break;
   }

   /* Returns TRUE on success, FALSE on failure */
   return TRUE;
}
E questo l' header dll.h:

codice:
#ifndef _DLL_H_
#define _DLL_H_

#if BUILDING_DLL
# define DLLIMPORT __declspec (dllexport)
#else /* Not BUILDING_DLL */
# define DLLIMPORT __declspec (dllimport)
#endif /* Not BUILDING_DLL */


DLLIMPORT void HelloWorld (void);


#endif /* _DLL_H_ */
In pratica dopo che ho compilato la dll voglio provare a eseguire il processo come fosse una dll,ma non viene nemmeno compilata.