An instance of this class represents a user-written callback in an application that uses an instance of Cplex to solve a mixed integer program (MIP). Cplex calls the user-written callback prior to solving each node in the branch-and-cut search.

User-written callbacks of this class are compatible with dynamic search.

This class allows you to access an incumbent solution, an incumbent node, and an incumbent objective value from a user-written callback. It also allows you to access priority orders and statistical information, such as the number of cuts that have been generated. Methods are also available to query the number of generated cuts for each type of cut Cplex generates. See the ILOG Cplex User's Manual for more information about cuts.