abap弹出对话框

data x_ans type c.
  call function 'POPUP_TO_CONFIRM_STEP'
  exporting
   DEFAULTOPTION        = 'Y'
    textline1            = 'this is a dog'
   TEXTLINE2            = ' '
    titel                = 'that is a cat'
   START_COLUMN         = 25
   START_ROW            = 6
   CANCEL_DISPLAY       = ''
  IMPORTING
    ANSWER               = X_ANS.
 write x_ans.