The function modules of function group XRGX include user exists for customer-specific field changes from the communication structures of Pricing. They are always called before header data or item data is put in internal tables.

• Entering, changing header and item data from Pricing
• EXIT_SAPLWLF1_003

The user is provided with the relevant document information and all data relevant to price calculation in the form of transfer parameters.

It is not possible to change all fields. Structures 'KOMLFKC' at header
Function/Program:

• EXIT_SAPLWLF1_003: Enhancement: Data Transfer Pricing Payment Documents