>So, is that something like the following?
>
>lcID="aaaaa"
>lnID=ASC(lcID) + 1
>
>>You just increment it by 1 , each time. When it becomes greater than a "z" you set it back to an "a" and increment the character to the left.

Sort of, but you would do this for the last character (asc() works with the first letter of a string), and then carry over to the previous character.

First with numbers, to understand the principle:

105
+ 1
===
106

199
+ 1
===
200

Note that in the first example, I only added one to the last digit. In the second example, I exceeded the range (0..9), so I had to set it back to zero, and add one to the previous digit. Since this was also already 9, I had to repeat the procedure of carry-over.

Similar for letters. If you want only lowercase letters (a..z), you continue adding one at a time, until you get to "z". After that, you have to restart to "a" (the equivalent of zero in the numeric example), and add one to the previous character.

Note also that the resulting string can become longer than the original:

 99
 +1
 ==
100

zzz
+ 1
===
What? aaaa? or baaa?