Use FM RSPC_POPUP_DATE_SELECTION :
Display messages in popup
CALL FUNCTION 'C14ALD_BAPIRET2_SHOW'
TABLES
I_BAPIRET2_TAB = T_RETURN_MESSAGE. " T_RETURN with type BAPIRET2_TAB
Open popup window to choose a diretory
Use method : cl_gui_frontend_services=>directory_browse.
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