What is function module exit in SAP BC-DWB-CEX - Customer Enhancements?

SAP Term: function module exit

• Component: BC-DWB-CEX

• Component Name: Customer Enhancements

• Description: A customer exit for ABAP programs in the form of empty or partially implemented function modules delivered with the standard SAP system. A function module exit is incorporated in ABAP programs using the statement CALL CUSTOMER-FUNCTION. The function module interfaces are predefined by SAP. The implementation can be empty or partially predefined. The customer must fully implement and activate them using transaction CMOD. From Release 4.6, function module exits can be replaced with BAdIs.

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• Key Concepts: 
  A function module exit is a customer-defined enhancement to an SAP standard function module. It allows customers to add their own code to the standard function module, allowing them to customize the functionality of the module. The component BC-DWB-CEX (Customer Enhancements) is used to create and maintain these customer-defined enhancements. 
  
  How to use it: 
  To use a function module exit, you must first create the enhancement in the BC-DWB-CEX component. This involves creating a new enhancement and adding your own code to it. Once the enhancement is created, you can then activate it in the SAP system. 
  
  Tips & Tricks: 
  When creating a function module exit, it is important to ensure that your code does not conflict with any existing SAP code. Additionally, it is important to thoroughly test your code before activating it in the system. 
  
  Related Information: 
  For more information on creating and using function module exits, please refer to the SAP Help documentation on BC-DWB-CEX (Customer Enhancements).