Hi. I have no Idea about COM, but while i was reading your Patch to learn, I do not understand this pair: > + > +#define HTMLWINDOW2_THIS(iface) DEFINE_THIS(HTMLWindow, HTMLWindow2, > iface) > + > +#undef HTMLWINDOW_THIS > + Did you mean +#undef HTMLWINDOW2_THIS > here? -- By by ... Detlef