#define CMfread(container, b, e, c) (*((ContainerPtr)container)->handler.cmfread)(((ContainerPtr)container)->refCon, (CMPtr)(b), (CMSize)(e), (CMCount)(c))
#define CMfwrite(container, b, e, c) (*((ContainerPtr)container)->handler.cmfwrite)(((ContainerPtr)container)->refCon, (CMPtr)(b), (CMSize)(e), (CMCount)(c))