Rockwell Automation 2708-NBD VBASIC Language Development Kit - Manual (Page 63)

A-B VBASIC and Visual BASIC
Appendix B
Differences Between
B–15
RETURN
Returns control from a sub routine. No line number or line label clauses are
supported in A-B VBASIC.
RIGHT$(stringexpression, n)
Returns the rightmost n characters of a string.
A$ = “Now is the time for all good men to come to the aid of”
B$ = RIGHT$(A$, 6) ‘B$ = “aid of”
RND
Returns a single–precision random number between 0 and 1. No argument is
allowed in the statement. To produce random integers in a given range, use
the following formula:
INT((upperrange – lowerrange + 1) * RND + lowerrange)
RTRIM$(stringexpression)
Returns a string with trailing (right–hand) spaces removed.
A$=”When I was younger, so much younger than today “
A$=RTRIM$(A$) ‘Removes trailing spaces.
SEEK(filenumber)
Returns the current file position. See the chapter on Special Devices for
details on specific devices. See VBDOS manual for detailed information.
SEEK [#]filenumber,position
Sets the position in a file for the next read or write. See the chapter on
Devices for details on specific devices.
SELECT CASE text_expression
Executes one or more statements depending on the value of text expression.
The CASE ELSE clause is mandatory in A-B VBASIC, even if it does
nothing. See VBDOS manual for specific details.
SELECT CASE text_expression
CASE expressionlist1
statements
CASE expressionlist2
statements
CASE ELSE