HARDDRIVE_DEVICE_PATH
HARDDRIVE_DEVICE_PATH HardDrive;
HARDDRIVE_DEVICE_PATH *HardDrive;
HARDDRIVE_DEVICE_PATH *hd;
dplen = sizeof(HARDDRIVE_DEVICE_PATH) +
dp->Length[0] = sizeof(HARDDRIVE_DEVICE_PATH);
hd = (HARDDRIVE_DEVICE_PATH *)dp;