Graphics

I'm quite new to Visual Logic so I am wondering how do you convert a letter in a string to a number e.g. A would output as 1, a=1, b=2, z=26

With visual logic, you can't... You have to create a script to do that with asc() method...
#XPression

Well. I've made an script in visual logic what does the trick. but it is huge :D.

about your solution... How does your script look like?
#XPression

Really ? A capture ?!

Considering your text object has 1 char only, into OnSetText :
text = asc(text)-96
#XPression

From text (A, B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,) to integer (1, 2, 3, 4, etc).

And from integer (1, 2, 3, 4, etc). to material selector.

#XPression