external interface design tools

[Mike Kerner]

Has anyone attempted to built an interface using an external tool, say
Sketch, for instance?  If so, what have you done to make the areas active?

-- 
On the first day, God created the heavens and the Earth
On the second day, God created the oceans.
On the third day, God put the animals on hold for a few hours,
   and did a little diving.
And God said, "This is good."