how to get vector, list from DLL to work with

class MainWindow
{
    public:
        MainWindow();
        ~MainWindow();
        list <SubWindow*> GetVector();
        list <subwindow*> MainWin;
        list <subwindow*>::iterator it;
};

list <SubWindow*> MainWindow::GetVector()
{
    // list <SubWindow*> MainWin;
    return MainWin;
}

list <void*>::iterator it; // ?????
typedef list <void*>(*VECTOR)(); // ?????
VECTOR _VECTOR;

HINSTANCE hDLL = LoadLibrary("Win32Project.dll");

if (hDLL != NULL)
{
    _VECTOR pVectorFunction = (VECTOR)GetProcAddress(hDLL, "GetVector");

    if (pVectorFunction)
    {
        for (it = MainWin.begin(); it != MainWin.end(); it++)
        {
            //do stuff here
        }
    }
}