If you want to have a dictionary in your graph and acces an entry from CTL2, you must define it in the graph as shown in Chapter 39, Dictionary.
To access the entries from CTL2, use the dot syntax as follows:
dictionary.<dictionary entry>
This expression can be used to
define the value of the entry:
dictionary.customer = "John Smith";
get the value of the entry:
myCustomer = dictionary.customer;
map the value of the entry to an output field:
$0.myCustomerField = dictionary.customer;
serve as the argument of a function:
myCustomerID = isInteger(dictionary.customer);