undo on AxWebBrowser

[Wiktor Zychla]

I use AxWebBrowser and mshtml to build a custom html-editor (much like other
existing html-editors but focused on my specific needs).

I have a problem with the undo function (via execCommand). it is commented
as "not currently supported" in MSDN and, in fact, it does not work. what's
even worse, the ctrl+z does not work either, after the text is added to the
editor with write() method.

as the result, the user is not able to undo his work in most of the time.

is there any hack or backdoor that leads to succesful solution of this
problem? I am not affraid of any deeper digging, for example I've been able
to succesfully fix the problem with dhtml events using the
UCOMIConnectionPoint interface.

Thanks in advance

Regards,
Wiktor