continuing a string in the next line

How can a string be continued in the next line ... in the below function call for popup_title i have to give 'Enter Sold-to party's Postal code and Region'

CALL FUNCTION 'POPUP_GET_VALUES'

EXPORTING

• NO_VALUE_CHECK = ' '

POPUP_TITLE = 'Enter Postal code and Region'

START_COLUMN = '5'

START_ROW = '5'

• IMPORTING

• RETURNCODE =

TABLES

FIELDS = IVALS

• EXCEPTIONS

• ERROR_IN_FIELDS = 1

• OTHERS = 2

.

IF SY-SUBRC <> 0.

• MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO

• WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.

ENDIF.

I appreciate your response