NativeHandler for linux?

I’m a little confused about the NativeHandler class, I can only see example code for the apple, which doesnt aparently do anything other than keep an eye on presence.

Is it possible that the NativeHandler for windows is burried in jniwrapper.jar? And that there isnt one for linux?

I am trying to work out why I cannot open a screen-grab on linux (it says no application association).

Any help gratefully appreciated…

Sam