Need to fill three customer exit variables based on a manual entry variable
I have the following scenario.
I need to create 4 variables, 1 variable is user entry variable and remaining 3 variables are customer exits.
The data flow should be user can enter 1st variable, the remaning 3 fields will be filled automatically by using customer exit program. For ex:
Variable 1 = YTD Act vs. YTD LY (manual entry) then
Variable 2 = Current year (Customer exit)
Variable 3 = 100 (Customer exit)
Variable 4 = Current year - 1 (Customer exit)
I need the sample customer exit code for the above scenario. Any help would be appreciated greatly