BYTE0
#define BYTE0(v) ((v >> 0) & 0xff)
#define BYTE0 0
#define BYTE0(h) ((h) & 0xFF)
#define BYTE0(h) (((h) >> 8) & 0xFF)
#define BYTE0(x) (unsigned char)(x)
#define BYTE0 (1UL << 8)
#define BYTE0(a) (LONG0(a)&0xff)