RECEIVE CHAR timeout
Receives a character of text on a channel.
Specify a timeout in milliseconds as the maximum
amount of time to wait for input, or set to 0 to wait
infinitely. Note that most channels do not support the reception of
text.
Return values:
-1 (hangup)
-
Failure or hangup
char (timeout)
-
Timeout
value
-
ASCII value of character, in decimal
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