Thanks. I tried your code and it works to produce the 5 character value. One requirement I needed was for the numbers to appear random. So I randomly interchanged the characters in the @Base36 value. I also changed the first line in the loop to subtract @i from 36. Then I commented out the set @key line.

Although I modified the code you gave me, you get the credit dude. I was lost on where to start. Thanks again.

YOUR CODE>>
DECLARE @i int, @key int, @Base36 char(36), @Key5 varchar(5)
SET @key = 1234578910
SET @Base36 = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ'
SET @Key5 = ''
SET @i = 1
WHILE @i < 6
BEGIN
SET @Key5 = SUBSTRING(@Base36, (@key % 36)+1,1) + @Key5
SET @key = CAST(@key / 36 AS int)
SET @i = @i + 1
END
SELECT @Key5

MY CODE>>
/* @identity_int passed in as a parameter */
DECLARE @i int, @key int, @Base36 char(36), @Key5 varchar(5),@ItsNew bit
SET @ItsNew = 0
WHILE @itsNew = 0
BEGIN

SET @key = @identity_int + 10000
/*
SET @Base36 = '0123456789ABCDEFGHIJKLMNOPQ9STUVWXYZ'
Randomize the order to generate numbers that look random.
*/

SET @Base36 = 'ZW2R4PGTK6XHFNOC9BIJML8DE5Q3S7UV1A0'
SET @Key5 = ''
SET @i = 1
WHILE @i < 6
BEGIN
SET @Key5 = SUBSTRING(@Base36, (@key % (36 - @i)+1),1) + @Key5
-- SET @key = CAST(@key / 36 AS int)
SET @i = @i + 1
END
/* Just in case the new value is not 'New' check it. If its new set the Its new bit and exit the procedure. New code checking removed*/

END
SELECT @Key5