Newline character in text field on interface

Hi there,

can "Newline" (Enter Key) character be accepted in "Text" field on the interface? and can be checked if "Newline" (Enter key) character being input (Enter key pressed)?

what I am trying to do is that finding the user finishing inputting the data, while dont want to move the focus (the text field is set as "Keypress" for "Refresh After").

regards,

Lin