DJS,
I don;t think it is possible to color characters with a different color
in the same cell.
so do you have another option?

DJS wrote:
Yes, they should be 17 alpha-numeric characters.

"stevebriz" wrote:

Are the string lengths the same in both column I and J for each row?
DJS wrote:
Hello~
I need some assistance in writing a macro which could compare each
alpha-numeric character in each row of column I & J and hightlight (via font
color) the characters of column I which are different, then move to the next
row. I need to run the macro on every row until i come to a blank row.
Any help greatly appreciated.

Thanks in advance,
Don