Implementing Function Module Exit

 

• Function module exit allows us to add code to our SAP Programs with the help of Function Modules.
• We can enhance our SAP programs using Function modules.

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Syntax :-

• For every Customer Exit we have a dedicated Syntax.
• CALL CUSTOMER-FUNCTION ‘three digit number’.
• the three digit number in the above syntax varies from 000 to 999.
• Example :- CALL CUSTOMER-FUNCTION ‘001’.

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let’s take a requirement first

Requirement :-

• Go to VA01 ( Create Sales Document ) transaction code.

  
  
  

  
  

  • Suppose, I have given this order type as OR and as soon as I press enter.

    
    
    

    
    

    • I want my Sold to Party should be auto populated.

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Note :-

• For any function module exit, we need to check, is there any function module exit available which will fill our requirement.

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Finding Function Module Exit Using debugging :-

• Step 1 :- Go to VA01 transaction code.

• Step 2 :- Write /h and press enter → It will turn the debugging mode.

  
  
  

  
  

• Step 3 :- Now, again press enter and you will enter to debugging mode.

  
  
  

  
  

• Step 4 :- Now, we need to put breakpoints on the keywords .

  • So, click on breakpoints → breakpoint at → breakpoint at Statement.
  
  
  

  
  

• Step 5 :- Here, in ABAP statements we need to write syntax.

  
  
  

  
  

  • Click on OK button.

• Step 6 :- Press F8, It will automatically stop at the Function module exit.

  
  
  

  
  

  • Also don’t forget to check whether, this function module exit fulfill your requirement or not.
  • If it is not, then we will have to continue checking whether this will work for us or not.
  
  
  

  
  

  • Now if I go inside this function module,
  
  
  

  
  

  • We can see in this function, that we can use this function module exit for pre assignment of Sold to Party.
  
  
  

  
  

  • We can use this function module for writing our code.

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Solution :-

• Step 1 :- Go to SE37 transaction code and give the name for the above function module.

  
  
  

  
  

  • In the Export tab we can see we have a parameter which we can use for Sold to Party.

• Step 2 :- Go to source code.

  
  
  

  
  

• Step 3 :- Double click on the include and open it in change mode and then write the below logic.

  
  
  

  
  

  • I have given this if condition so that it could not affect the other users.

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Execution :-

• Step 1 :- Go to VA01 transaction code and give the order type as OR.

  
  
  

  
  

  • Press enter.
  
  
  

  
  

  • We can see that sold to party is automatically getting populated.

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Note :-

• Always remove the code after practicing it.