Exercise on BADI

1. Define and Implement a BADI, which will select Customer name from KNA1 based on Customer number.
2. Build a program, which has Customer number as the selection screen input and call the BADI to fetch the customer name and display it as output.
3. Create a filter BUKRS in the BADI definition which makes the BADI call acceptable only when Company Code is 0001 and 0005.
4. Modify the existing program done in No. 2 in such a way that program calls BADI with filter value.