ISPF - TIP #017

I have to compare one input file field with one output file field.
The input file field in is column1 to 10 and the output file field is in column 40 to 50.
How can I do it?
Solution:
1. Use the standard 3.13 ISPF option. In the same screen itself, in the command line issue, E
2. then type,
CMPCOLN 40:50
CMPCOLO 1:10
3. press PF3 and exit
4.In the New dataset , type in the output dataset
5. In the Old dataset , type in the input dataset