#define NORMAL_PRIORITY_CLASS       0x00000020
#define IDLE_PRIORITY_CLASS         0x00000040
#define HIGH_PRIORITY_CLASS         0x00000080
#define REALTIME_PRIORITY_CLASS     0x00000100
# Win2000
#define BELOW_NORMAL_PRIORITY_CLASS 0x00004000
#define ABOVE_NORMAL_PRIORITY_CLASS 0x00008000