Renaming Selection Text of Fields on Selection Screen

Here is a little tricks for you to change the name of the field text label in selection screen.
A Simple Case Requirement when you can handle 2 types of documents like Sales Document and Billing Document, then you want to change the label of the VBELN into sales/billing according the the selection of a radio button you have chosen. Well you can simply follow the following steps:

1. Define Seltext table and workarea
   

   
       DATA it_seltexts TYPE TABLE OF rsseltexts.
       DATA wa_seltexts TYPE rsseltexts. 
   
   

2. You can set a new selection text for several fields by inserting the record into it_seltexts table
   

   
        wa_seltexts-kind = ' '. "Type of the field P/S (Parameters /Select Options)
        wa_seltexts-name = ' ' "Name of the field
        wa_seltexts-text = ' '. "Seletion text of the field
        INSERT wa_seltexts INTO TABLE it_seltexts.
   
   

3. Finally, Call modify function to execute the changes according the it_seltexts table
   

   
        CALL FUNCTION 'SELECTION_TEXTS_MODIFY'
          EXPORTING
            program  = sy-repid
          TABLES
            seltexts = it_seltexts
    *           EXCEPTIONS
    *       PROGRAM_NOT_FOUND                 = 1
    *       PROGRAM_CANNOT_BE_GENERATED       = 2
    *       OTHERS   = 3
          .
        IF sy-subrc <> 0.
       ENDIF.