NewHandleSysClear
zone
Size dataSize ; desired size for the data (a 32-bit value) returns handle leading to allocated area; NIL if it couldn't
allocate the memory.
performs just as NewHandle does, except that it uses the system heap to allocate the handle and it fills the allocated block 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).