Steps for Variable User Exit

Question

Hi All,
I have to do some coding in my variable exit. I have followed the follwing steps to create a project a write the code. Anyone please confirm if my steps are correct or missing anything.
1. Go to CMOD, give project name and Click on create.
2. Enhancements -> give RSR00001. and click on Components.
3. Double click on 'EXIT_SAPLRRS0_001'. This will bring up the functionmodule in which we can find an include.
4. Double click on 'ZXRSRU01' Include.
5. Press Enter for the warning message.
6. It gave me a message saying that 'the Include doesnot exist, Do you want to create it'. Click Yes. This will bring up a blank ABAP editor.
7. Write the required code using CASE Statement.
Am I missing anything here?
I would be grateful if someone can send me any documents relating to the variable User Exits.
Best Rgds,
James.

Answer 1

Hi,
Directly go se38 and execute ZXRSRU01 program. Then write a case statement. below is the sample code to calculate default year month variable.
case v_name.
  when 'ZYRMTH'.
    if i_step = 1.
      read table i_t_var_range
      with key vnam = 'ZYRMTH'
           into ld_s_var_range.
      if sy-subrc ne 0.   " no value exists, assigns default
        c_year = sy-datum(4).
        c_month = sy-datum+4(2).
        if c_month = 1.
          c_year = c_year - 1.
          c_month = 12.
        else.
          c_month = c_month - 1.
        endif.
        concatenate c_year c_month into c_monyr.
        l_s_range-low = c_monyr.
        clear e_t_range.
        l_s_range-sign = 'I'.
        l_s_range-opt  = 'EQ'.
        append l_s_range to e_t_range.
      endif.
    endif. 
endcase.
Regards,
Malli