I want to change song in spotify with a global key in ubuntu. This is possible on windows with a special key on keyboard, the "next song key"(?) 

How can I remap a key in ubuntu(no "next song" button here) to work as "next song" button? like "ctrl +right key".

And how would i do to make this work with spotify, which is running thru wine?

Basically i want to know what the ascii code for "next song" button is, and how do i map it to a key combination under ubuntu. And hope it routes this command thru wine without problem.

Edit: I don't have the "next song" button on the ubuntu machine.