>Do you mean adding new code to the subclass that needs a new declaration or adding new code that references a declaration that the super class already contains?

Mark,

Perhaps this will help you understand the situation.

.h files contain compiler directives. The directives in them affect the way code is compiled. #DEFINE is a search and replace command to the compiler that says whereever you find this string, replace it with this other one before you compile the code.

When you add a header file to a class definition, the class DOES NOT contain the definitions. The compiler uses the header file when it compiles that class. If you then subclass that one and again use a constant from the header file, you must include the header file in the new class as well. This is because the two classes are compiled separately and both need the header file to control the compiling process.