NewHandleClear
NewHandleClear Allocate cleared relocatable block from current heap zone
#include <Memory.h> Memory Manager
Size dataSize ; desired size for the data (a 32-bit value)
returns handle leading to allocated area; NIL if can't
NewHandleClear is a variation on the routine NewHandle. It performs
just as NewHandle does, except that it fills the allocated space with zero (0).
dataSize is the desired size for the allocated data area. The allocated block
actually occupies up to 12 bytes more than dataSize .
Returns: a generic Handle (a pointer to a pointer to a data area; officially,
Handle is a typedef for char **). If the area cannot be allocated,
the return value is NIL (0).

Notes: See NewHandle for more information.