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Syntax: N_ANYKEY(<procedureC>)

Calls user defined procedure when any "program-detectable" key is pressed.

Example

* Count the number of keys pressed during program
PUBLIC key_count
key_count = 0
N_ANYKEY("Countkeys")
 ...
PROCEDURE Countkeys
key_count = key_count + 1
RETURN

Notes

N_ANYKEY is active only during a Wait state, i.e., during a Wait state -
such as READ, ACCEPT, etc.

87:  INKEY is not a Wait state, N_ANYKEY is not active.

5.0: INKEY is a Wait state, N_ANYKEY is active.

N_ANYKEY("") with a null string disables N_ANYKEY interrupts.  N_ANYKEY
should be disabled while, or as soon as it is no longer needed.

N_ANYKEY detects only those keys with a specific Ascii code.  This excludes
shift and lock keys, but includes Ins and Del.  Use N_ONSHIFT to detect
shift and lock keys.

Clipper processes the key press before the event procedure gets control.

N_ANYKEY() with no parameters is usually issued from inside the Event
Procedure and returns the numeric value of the trapped key.  The key is not
removed from the keyboard buffer.