Rockwell Automation 2708-NBD VBASIC Language Development Kit - Manual (Page 57)

A-B VBASIC and Visual BASIC
Appendix B
Differences Between
B–9
END IF
LOOP
UpdateTime:
LOCATE 1, 1, 0
PRINT LEFT$(CurrTime$,2); “:”; RIGHT$(CurrTime$,2);
RETURN
GOTO {linelabel/linenumber}
Branches unconditionally to the specified line. See VBDOS manual for
detailed information.
HEX$(expression)
Returns a string that represents the hexadecimal argument expression. See
VBDOS manual for detailed information.
IF...THEN...ELSE
Allows conditional execution, based on the evaluation of a Boolean
expression. See VBDOS manual for detailed information.
IF (A > B) AND (C > D) THEN
Sum = (A – B) + C
ELSEIF (A < B) AND (C < D) THEN
Sum = (B – A) * D
ELSE
Sum = A * C
END IF
INKEY$
Reads a character from the keyboard. If no key is currently being pressed, it
returns a null string. All key codes in a DH5 terminal are a single byte. The
codes corresponding to special keys can vary due to differences in keypad
configurations. If necessary, use this function to get a keystroke, convert it
using ASC, then print the result.
A$ = “”
DO WHILE A$ = “”
A$ = INKEY$
LOOP
INPUT$(bytecount[,[#]filenumber])
Returns a string read from the specified file. A common error is switching
the byte count and the filenumber. To prevent this, always use the # symbol
with the filenumber even though it’s optional. See the chapter on Special
Devices for details on INPUT$ from particular devices.
J$ = INPUT$(LOC(1),#1)