Get List of Currently Opened Forms

I need to get the list of currently opened forms (documents, catalogs, data processors) from my data processor and get an access to its data for editing and calling procedures and functions of these forms. Is there a way to do that?

ClientApplicationWindows = GetWindows();
For k = 0 to ClientApplicationWindows.Count()-1 Do

ClientWindow = ClientApplicationWindows[k];
ContentForm = ClientWindow.GetContent();

EndDo;

Thanks, Mikhail!