Turing game help. How to store answers from mouse click

[saraassim98]

My game is exactly like 4 pics 1 word. im making a game where you have to guess the word that goes with the two pictures. You get twelve letters to pick from. when you pick a letter it is put in a box as letter you picked to solve the word. I How can i store the letters that the user picked and make sure that they dont go in the same box.
does any one know how to do this???

[Raknarg]

Just use a string. Start with an empty string:

var answer : string := ""

If they pick the letter a, add that to the string.

answer += "a"

If they want to erase the answer:

answer := ""