Bonjour, j'ai deja parcouru le forum et tente d'utiliser

http://www.developpez.net/forums/viewtopic.php?t=252919

ca a marche une fois puis plus, j'accede a la DLL, mais je n'arrive pas a acceder aux fonctions, qq'un pourrait m'eclaircir ?

code pour la DLL
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#include <windows.h>
#include <string>
using namespace std;
 
#define DllImport  __declspec( dllimport )
#define DllExport  __declspec( dllexport )
 
/* 
DllClass::DllClass() {} 
DllClass::~DllClass () {} 
*/ 
 
char AppName[] = "DLL Screen Tool"; 
char HelloMsg[] = "Hello, you're calling a function in this DLL"; 
char LoadMsg[] = "The DLL is loaded"; 
char UnloadMsg[] = "The DLL is unloaded"; 
char ThreadCreated[] = "A thread is created in this process"; 
char ThreadDestroyed[] = "A thread is destroyed in this process"; 
 
DllExport 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 (NULL, LoadMsg, AppName, MB_OK); 
        break; 
 
      case DLL_PROCESS_DETACH: 
        MessageBox (NULL, UnloadMsg, AppName, MB_OK); 
        break; 
 
      case DLL_THREAD_ATTACH: 
        MessageBox (NULL, ThreadCreated, AppName, MB_OK); 
        break; 
 
      case DLL_THREAD_DETACH: 
        MessageBox (NULL, ThreadDestroyed, AppName, MB_OK); 
        break; 
    } 
 
    /* Returns TRUE on success, FALSE on failure */ 
    return TRUE; 
} 
 
 
DllExport void TestHello() {
	MessageBox (NULL, HelloMsg, AppName, MB_OK); 
}
code pour le prog
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#include <windows.h>
#include <iostream>
#include <fstream>
#include <string>
 
using namespace std;
 
char LibName[] = "I:\\C\\HTMLActiveXTools\\Debug\\HTMLActiveXTools.dll"; 
char Hello[] = "TestHello";
char Text[]	= "CHTMLTextBox50" ;
char DllNotFound[] = "Cannot load library"; 
char AppName[] = "Load Library"; 
char HelloNotFound[] = "TestHello function not found";
char TextNotFound[] = "CHTMLTextBox50 function not found";  
 
HINSTANCE hLib; 
FARPROC TestHelloAddr;
FARPROC TestTextAddr; 
string HTMLLine; 
 
int WINAPI WinMain (HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR CmdLine, int ShowLine) { 
        hLib = LoadLibrary ((LPCTSTR)LibName); 
        if (hLib==NULL) { 
                MessageBox (NULL, DllNotFound, AppName, MB_OK); 
        } else { 
                TestHelloAddr = GetProcAddress (hLib, Hello); 
                if (TestHelloAddr==NULL) { 
                        MessageBox (NULL, HelloNotFound, AppName, MB_OK); 
                } else { 
                        TestHelloAddr(); // call [TestHelloAddr]; 
                } // endif 
                FreeLibrary (hLib); 
        } // endif 
        //ExitProcess (NULL);
    return 0; 
}