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+# $EPIC: getserial.txt,v 1.2 2007/02/19 03:20:46 jnelson Exp $
+======Synopsis:======
+$[[getserial]](HOOK + //number//)
+$[[getserial]](HOOK - //number//)
+======Description:======
+This function allows you to retrieve a serial number that is guaranteed not
+to be in use.  At the time of this writing, the only serial number type that
+is supported is for [[on]] hooks, although more types are expected in the
+future.
+The first form returns the first serial number that is later than //number//
+that is not in use by any [[on]] hook of any type, whatsoever.  It is
+absolutely guaranteed //at the time you call getserial// that you can use
+this serial number with no interference to or from any other script that
+also uses [[getserial]].
+The second form returns the first serial number that is smaller than //number//
+that is not in use by any [[on]] hook of any type, whatsoever.
+The //number// value is optional; the default value of //number// is 0.
+This feature is closely related to the ability to specify a bare //+// or
+//-// as the serial number in an [[on]].
+======History:======
+This function was written by wd and first appeared in EPIC4-1.1.8.