How do you add modifiers in the AHK script?

I use a very simple Toggle AHK script. How do I add the ability for it to detect if I am also holding down a modifier?

Here is my script.

toggle = 0
#MaxThreadsPerHotkey 2
#ifWinActive World of Warcraft
{
^x::
Toggle := !Toggle
While Toggle{
Send {5}
sleep 500
}
return
}
Numpad0::ExitApp