add
Adds an alphanumeric plain-text parameter.
General format
void add ( paramName, paramValue )  | 
Syntax rules
1.	paramName is an alphanumeric data item that specifies the parameter name.
2.	paramValue is an alphanumeric data item that specifies the parameter value.
Example
To define parameters:
77 city-zipCode pic x(7) value "26456". ...   set params = http-param:>new()                          :>add("get_Zip_Code", city-zipCode).  |