Rebecca,

This should return the next letter (you can substitute a variable or field for the 'a'):

CHR(ASC('a')+1)

>vfp 3.0 win 98
>
>Hello All,
>
>Trying to automatically generate new invoice number
>with a separate field that shows a,b,c etc.
>
>Came across the ASC() COMMAND and example
>but can't get it to work properly in this situation.
>
>Any thoughts? Thanks and have a great day!
>
>Becky