What is 'function code' in SAP BC-ABA - ABAP Runtime Environment?

function code - Overview

• Component: BC-ABA

• Component Name: ABAP Runtime Environment

• Description: Sequence of up to 20 characters that can be assigned to specific control elements of the user interface in SAP GUI. When one of these control elements is selected, the dynpro event PAI is raised and the function code is passed to the ABAP program using the system field sy-ucomm or the OK field of the dynpro.

function code - Details

• 
  Key Concepts: 
  Function code is a type of ABAP command used to execute a specific function in the SAP system. It is used to control the flow of a program and to call other programs. Function codes are usually entered in the command field of a transaction or program. 
  
  How to use it: 
  Function codes are used to control the flow of a program and to call other programs. They can be used to execute specific functions such as creating, changing, or deleting data. Function codes can also be used to navigate between screens in a transaction or program. 
  
  Tips & Tricks: 
  When entering a function code, make sure that you enter it in the correct format. For example, if you are entering a function code in the command field of a transaction, make sure that you enter it in uppercase letters. 
  
  Related Information: 
  Function codes are part of the ABAP Runtime Environment (BC-ABA) component of SAP. This component provides the necessary tools and functions for developing and running ABAP programs. For more information about this component, please refer to the SAP documentation.