Increment the Alphabet

[quillpro]

I have a text field that is blank at the start. When you press a button and the field is blank it add the letter "A". What I want then is if you press that button again the letter will become "B" and so on. I could write it out of course.

Case (

field = A ; B ;

field = B ; C

and so on )

Is there a better way to write?

TIA

[quillpro]

Sorry, I put this in the wrong topic. Should have gone in Scriptmaker.

[comment]

Try Set Field[] with the following calculation:

Let ( [

alpha = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" ;

pos = Position ( alpha ; field ; 1 ; 1 ) ;

len = Length ( alpha ) ;

next = Mod ( pos ; len ) + 1

] ;

Middle ( alpha ; next ; 1 )

)

This will rotate the alphabet in a loop.

[quillpro]

Perfect. Thanks Comment!