void MyFrame::OnListCtrlSelected(wxListEvent& event) { int itemIndex = event.GetIndex(); EmployeeRecord* empRecord = (EmployeeRecord*)event.GetData(); // use the empRecord object for processing }In this example, a wxListEvent is triggered when the user selects an item in the list control. The GetData() function is used to retrieve the associated employee record object, which is then used for processing. The package library used for this code example is the wxWidgets library, which is a popular C++ GUI library used for creating cross-platform applications.