The InputBox allows for a Title parameter Where you can instruct the user to
Not enter over 8 text characters (say), but additionaly put in a line of code
following the Inputbox line, somthing like..
ans = Incputbox("Enter proper text - Limit to 10 Characters..")
if Len(ans) > 10 then
Msgbox "Too many characers, limit to 10 or less"