Setting Control Numbers
By default the Interchange Control Number, Group Control Number and Transaction Set Control numbers are generated in the new 997 acknowledgement. These fields can also be overridden.
Example
Ack997Generator ack = new Ack997Generator();
// Override control numbers
ack.InterchangeControlNumber = 1234;
ack.GroupControlNumber = 5678;
ack.TransactionSetControlNumber = 9876;