howto make IEHtmlWindow readonly ?

hello,

I'm planning to use IEHtmlWindow to view all kinds of documents
(html, pdf, word, excel, powerpoint, etc).
I just tried it in the wxPython demo,
and indeed they all work, but ...
... all these documents (except powerpoint) can be edited.
And I just want to view the documents :frowning:

Is there a way to make IEHtmlWindow ReadOnly ?

thanks,
Stef Mientki