Passing parameters from application event actions

Parameter lists to methods, scripts, web services, and generated events are always enclosed in a PARAMS(…) function and delimited by commas. Each parameter is specified in one of these ways:

Syntax	Direction	Meaning
V(var)	Input	Pass in the value of the variable var.
expression	Input	Pass in the value obtained by evaluating the expression.
RV(var)	Input and output	Pass in the value of the variable var, and place the output value into the same variable.