An alternative to arrays:

#DEFINE CRLF CHR(13)+CHR(10)
LOCAL lcText, lnNumLines, lnLine, lcLine
lcText = CRLF + FILETOSTR("myfile.txt")
IF RIGHT(lcText,2) = CRLF
  lnNumLines = OCCURS(CRLF,lcText) - 1
ELSE
  lnNumLines = OCCURS(CRLF,lcText)
ENDIF
FOR lnLine=1 TO lnNumLines
  lcLine = STREXTRACT(lcText,CRLF,CRLF,lnLine,2)
  ? lcLine
ENDFOR

The CRLF is added to the beginning to allow STREXTRACT to extract the first line.