Cycling through alternate characters not on some keyboards

{
    global DoTimeout := false ; toggle

    global DefaultCursorBlinkRate := .530 ; in seconds (530ms). Windows 10 default
    global TimeoutTime := 2.5 * DefaultCursorBlinkRate
    global TimeoutString := DoTimeout ? "T" . TimeoutTime :
}

; Allows the user to choose a string in KeysArray. Switching between strings is toggled by pressing the CycleKey.
; Despite what the name implies, strings in KeysArray can contain more than one character.
CycleAltKeys(KeysArray, CycleKey) {
    SendInput % KeysArray[1]
    Input LastKey, %TimeoutString% L1, {BS}
    count := 0
    while LastKey = CycleKey {
        Backspaces(StrLenU(KeysArray[count + 1]))
        ModIncrement(count, KeysArray.MaxIndex())
        SendInput % KeysArray[count + 1]
        Input, LastKey, %TimeoutString% L1, {BS}
    }

    if ErrorLevel = EndKey:Backspace
    {
        SendInput {BS}
    }
    if ErrorLevel = Timeout
    {
        SendInput {Space}
    }
    else {
        SendInput % LastKey
    }
}

; Sends Num amount of backspaces.
Backspaces(Num) {
    Loop %Num% {
        SendInput {BS}
    }
}

; Performs modular incrementation on Num.
ModIncrement(ByRef Num, Modulus) {
    Num := Mod(Num + 1, Modulus)
}

; Determines the length of the string Str containg escaped Unicode characters.
StrLenU(Str) {
    return StrLen(RegExReplace(Str, "{U\+\w+}", "⨯"))
}

; Allows the user to choose between "equals" (=) and "approximately equals" (≈), using just the "equals" key provided on most keyboards.
=::CycleAltKeys(["{U+003D}", "{U+2248}"], "``")