ISDN Protocol Administrator's and Developer's Guide ... - Intervoice

Using the ISDNTKIT Toolkit SubroutinesParametersOptional. However, if Required appears in the Defaults column, thisfield is required.A parameter can be aconstant, a variable, or anexpression.Specify the following:• Parameters to be passed to the subroutine (input parameters)• Parameters to be passed from the subroutine to the application(output parameters)• Parameters to be passed to the subroutine, modified by thesubroutine, and then passed back to the application(input/output parameters)To enable the application to receive a value back from thesubroutine (in the case of output or input/output parameters),precede the variable with a right angle bracket (>) on theUserSubroutineCall form; for example, >myData. The subroutinecan modify the value of variables passed by reference and return adifferent type.If the parameter type is an ordered collection, it will be a collectionof key-value pairs in the format of ~(‘variablename 1’‘variablevalue 1’ ‘variablename 2’ ‘variablevalue 2’), wherevariablename n is the name of the variable and variablevalue n is itsvalue.A parameter line left empty is set to the value shown in the Defaultscolumn.For more informationabout subroutines andparameter passing, seethe InVision User’s Guide.Parameter ValuesThe Defaults column displays Required or a defaultvalue, based on the SubroutineEntry starting point form.DefaultsRead-only. Displays the following:• Required, which indicates you must enter a constant, variable,or expression in the Parameters field for this parameter.or• A default value (as a string, number, or array) for the subroutineto use if you do not specify a constant, variable, or expression inthe Parameters field.60001262, First Edition Common Subroutines for the ISDN Toolkit 4-7