opposite of _IsPressed??

So i understand _IsPressed and ive used it a few times before. Currently im trying to figure out how to do if any other key is pressed besides the one its looking for.

#include <GUIConstantsEx.au3>
#include <WindowsConstants.au3>
#include <Misc.au3>
#include<String.au3>

$Form1 = GUICreate("GUI", 401, 201, 723, 228)
GUISetBkColor(0x0000FF)
GUISetState(@SW_SHOW)
Local $hDLL = DllOpen("user32.dll")
 
HotKeySet("{F2}", "Close")
 
$Password = "Hello"
 
Func Close()
    Exit
EndFunc
 
$Password = StringUpper($Password)
$len = StringLen($Password)
$array = StringSplit($Password, "")
For $i = 1 to $len Step 1
    $Hex = _StringToHex($array[$i])
        Do
            Sleep(100)
        Until _IsPressed($Hex)
Next
ConsoleWrite("Outside the For Loop")
 

currently, if you just mash the keyboard, you will eventually get the password correct since the For loop doesnt reset itself on an incorrect letter. eventually i would like it to put an * in the top left corner as a tooltip for every letter i type correctly. if i type it incorrectly too many times, it will run a count down as a tooltip in the top left corner. however im just trying to get the first part done which is the for loop resetting on an incorrect letter typed.