C / C++ / MFC

#if defined _COMPILING_PROJECT_IHM_DLL
#define EXPORT_CGENERIC_DLG __declspec(dllexport)
#else
#define EXPORT_CGENERIC_DLG __declspec(dllimport)
#endif

class EXPORT_CGENERIC_DLG CGeneric_Dlg : public CDialog_Dlg
{
// bla bla bla
}

void f ( Matrix& m )
{
  m(2,5) = 3.14;  // calls double& Matrix::operator()
}

void g ( const Matrix& m )
{
  m(4,1) = 42;  // calls double Matrix::operator() const
                     // error, can't assign to a plain double
}

1. Your Func method has to be static if you want to pass it on as a regular function pointer. Check Mike Dunn's C++ FAQ for details.
   
2. Once you hace declared your method static, you can set its calling convention like this:

   class CMy{
     ...
     static void __cdecl Func();
   };

   
   

static CMy* pMy = NULL;
 
static void StaticFunc()
{
  if (pMy != NULL) {
     pMy->Func();
  }
}

CMy my;
pMy = &my;
CallIt (&StaticFunc);