WHEN A STRING VALUE IS IN "BUF", OR IT IS IN STRING SPACE AND THERE IS AN ACTIVE POINTER TO IT. THUS F$=G$ WILL CAUSE COPYING IF G$ HAS ITS STRING DATA IN STRING SPACE. F$=CHR$(7) WILL USE ONE BYTE OF STRING SPACE TO STORE THE NEW ONE CHARACTER STRING CREATED BY "CHR$", BUT THE ASSIGNMENT ITSELF WILL
