v2_2 of 3_a function that thows an error working code.ahk

;   a function that throws an error
#Requires AutoHotkey v2.0
#SingleInstance Force
;
VNfunction(verb, noun) {
    CheckArg verb, noun
    ;
    CheckArg(verb, noun) {
        MsgBox(verb,noun,"T2")
        if verb = noun
            throw ValueError(verb " is the same word as ", noun)
    }
}

VNFunction("verb","noun")
VNFunction("fly","ball")
VNFunction("food type","day of year")
VNFunction("date","date") ; Error: date is the same word as 
;
;The current thread will exit.
;  code=0 after exit app
Esc::ExitApp
ExitApp