lock Example
10 CLEAR SCREEN
20 PRINT "*** Lock Test ****"
30 PRINT
40 CREATE "test.txt",100
50 DIM Test$[100]
60 ASSIGN @File TO "test.txt";FORMAT ON
70 PRINT "CAT after assignment..."
80 CAT "test.txt";NO HEADER
90 OUTPUT @File;"This is the contents of test.txt"
100 RESET @File
110 ENTER @File;Test$
120 PRINT
130 PRINT Test$
140 PRINT
150 LOCK @File;CONDITIONAL Error !This locks a file while you are working on it.
160 PRINT "CAT after lock..."
170 CAT "test.txt";NO HEADER
180 PRINT
190 PRINT "Lock result is";Error
200 UNLOCK @File !This unlocks the file.
210 PRINT
220 PRINT "CAT after unlock..."
230 CAT "test.txt";NO HEADER
240 ASSIGN @File TO * !This will also unlock the file. Comment out the unlock
250 PRINT !statement to show this.
260 PRINT "CAT after file is closed..."
270 CAT "test.txt";NO HEADER
280 PURGE "test.txt"
290 END
