Selected unit

is there a way to detect the selected unit? Is it triggering unit? Im not currently at a computer with wc3, so I can't check, just mustering these thoughts in my head.

That event is a specific unit event. So you already know which unit when the event occurs.

(Unit - Specific Unit Event)
Unit - [Whatever] is selected

Umm, no its not.

Player 1 (Red) Selects a unit

But I found out already. Its triggering unit.