How to use the mouse wheel to move between listed items in the DBLookupComboBox? Like the way it does in ComboBox. I am using c++builder xe6

Here's the code: #include <iostream> #include <iomanip> #include <typeinfo> #if 0 std::ostream &foo(std::ostream &os, std::ios_base &(*x)(std::ios_base &), bool ...