GameMaker How to get alphabet only keyboard input

[ouryuuken12]

Hi,
Currently i'm using this code inside 'key press - any' event :

if(keyboard_check(ord("A"))){
    audio_play_sound(snd_click,10,false);
}

That code only check if the inputted key is 'A'
How can i check if the inputted key is A to Z ?

 

[Seknight]

you could use keyboard_string to get a list of which keys were pressed

GameMaker Manual

and then use ord to check if the key pressed was between A to Z

GameMaker Manual

Tell me if you need more specific instructions, though I haven't actually tried this myself.