Here is the sample code for your requirement.
  
selection-screen :begin of block test with frame title text-001.
parameters:p_rad1 radiobutton group one user-command test,
                 p_rad2 radiobutton group one.
selection-screen:end of block test.
selection-screen:begin of block test2 with frame title text-002.
parameters:p_file(10) TYPE C MODIF ID TL,
                 p_file1(10) TYPE C MODIF ID TT.
selection-screen:end of block test2.
   
AT SELECTION-SCREEN OUTPUT.
  IF P_RAD1 = 'X'.
      LOOP AT SCREEN.
          CHECK SCREEN-GROUP1 = 'TT'.
          SCREEN-INPUT = '0'.
          MODIFY SCREEN.
      ENDLOOP.
  ENDIF.
  IF P_RAD2 = 'X'.
      LOOP AT SCREEN.
         CHECK SCREEN-GROUP1 = 'TL'.
         SCREEN-INPUT = '0'.
         MODIFY SCREEN.
      ENDLOOP.
  ENDIF.



Serkan AKKAVAK
Computer Engineer
ABAP Developer & SAP MM SD Consultant
Contact : serkurumsal@yandex.com