How the host will load a Plug-in

The host application will handle a Plug-in in the following manner (some code is Windows-specific!):

HMODULE hModule = LoadLibrary ("SomePlugin.dll");
if (hModule)
{
    InitModuleProc initProc = (InitModuleProc)GetProcAddress (hModule, "InitDll");
    if (initProc)
    {
        if (initProc () == false)
        {
            FreeLibrary (module);
            return false;
        }
    }

    GetFactoryProc proc = (GetFactoryProc)GetProcAddress (hModule, "GetPluginFactory");

    IPluginFactory* factory = proc ? proc () : 0;
    if (factory)
    {
        for (int32 i = 0; i < factory->countClasses (); i++)
        {
            PClassInfo ci;
            factory->getClassInfo (i, &ci);

            FUnknown* obj;
            factory->createInstance (ci.cid, FUnknown::iid, (void**)&obj);
            ...
            obj->release ();
        }

        factory->release ();
    }

    ExitModuleProc exitProc = (ExitModuleProc)GetProcAddress (hModule, "ExitDll");
    if (exitProc)
        exitProc ();

    FreeLibrary (hModule);
}