No it isn't the right click button, i use xbutton1, which is one of the side buttons on my mouse, that is why i said you guys will need to customize that to whatever button you plan to use it with.
xbutton1::Identify() ; Assign Insert to Identify
change the "xbutton1" to a key of your choice. Also i probably wouldn't assign the key to the left/right buttons since those are your primary move & attack keys.