Tandy 1000 Basic Reference Manual page 194

Chapter 10
I
BASIC Keywords
KEY/Trap
Statement
KEY(number) action
Turns on, turns off, or temporarily halts key trapping for a spec-
ified key.
Action may be any of the following:
ON
enables key trapping
OFF disables key trapping
STOP temporarily suspends key trapping
Number may be a number in the range 1 to 20, indicating the
number of the key to trap. Function keys use their corresponding
function key number (1-10). The cursor direction key trap num-
bers are:
11
12
13
14
User-defined keys are 15-20. Use the following syntax to define
your own user keys:
KEY number, CHR$(key)
+
CHR$(scan)
Key is one of or a combination of the following:
&H40 [CAPSJ lock key
&H20 (NUMLOCK] key
&H08 (ALT) key
&H04 [CTRLJ key
&H02 Left key
&H01 Right key
Scan is the scan code for
a
physical key on the keyboard.
See the appendices for a list of scan codes.
Notes:
Trapped keys do not go into the keyboard buffer.
0
Defining a function key or a cursor-direction key has no
effect. BASIC considers them pre-defined.
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