Finding Actual function module for a Function Exit

[Former Member]

It is common to find customer exits in SAP’s code and Function modules, to accommodate customer specific business rules in SAP provided applications. These exits sometimes are in the form:

Call Customer-Function ‘xxx’, where ‘xxx’ is usually a number. So, how do we know what the actual function module is, where we should put our custom code?

Here is a screen shot of a function module with customer exit:

To find out the actual function module, we will need to know what the main program name is. You can go to the main program using the menu item GO TO –> Main Program

Now, our customer exit name would be:

EXIT_<Progam Name>_<XXX>,

Where    
<Program_Name> is the main program name     
<XXX>                  is the number next to “Customer-Function”

In this example function module, the main program was : SAPLHRBEN00GENERAL.

Hence, our customer exit will be  
EXIT_SAPLHRBEN00GENERAL_022