The super class contains:
#DEFINE ONEKB 1024
If your code use the constant ONEKB as:
IF THIS.FileSize > ONEKB
ENDIF
The subclass contains:
IF THIS.FileSize > ONEKB +1
ENDIF
Do I need to include the .h in the subclass?
Software engineers are trained to read and understand code; they are not trained in mind reading. Document the purpose not just the functionality.