|Short Text||User exit: additional functions for user key +US1|
These are the components of customer exit QEEM0021.
Function module exits are called from SAP programs at defined points with the ABAP
CALL CUSTOMER-FUNCTION <nnn>.
With custom function codes, it's possible to add functionality to SAP screens. It can be triggered with the respective function code. The custom logic must be added in a corresponding function module exit, to which the triggered function is passed as a parameter.