Passolo 2016 UI

Dear SDL,

I am developing an addin for Passolo 2016 (2015) and i had a few question in my mind, to which the API's help could not answer. Could you give me a hand the following topics. I am curious whether they are possible and if yes where can i found the documentation/sample for it

  1. Is there a way to embed a window into the Passolo GUI (like the ViewPart in Trados Studio)?
  2. Is there a way to select a line("segment")?
  3. For one plugin only one ribbon button can be placed?

Thanks in advance,

Balázs