... inherit from a Visual Basic class and vice versa, and your pro-gram can be a mixture of C# and Visual Basic modules (and, for that matter,“managed” C++ and J# and . . .).No Global Data or FunctionsC++ ... 251destructor and, 271–272HAS_A relationship and, 259–261hierarchy, restarting,296–299importance of, 253–254interface and, 316–319invalid cast and, 262–263is operator and, 263–264IS_A property and, ... programminglanguageconstructors and, 382–383global data or functions and, 380interface and, 383–384memory allocation and, 380multiple inheriting and, 383overview of, 379–380pointer variables and, 381template...