enum _DEVICE_USAGE_NOTIFICATION_TYPE {
DeviceUsageTypeUndefined = 0,/* 0x0 */
DeviceUsageTypePaging = 1,/* 0x1 */
DeviceUsageTypeHibernation = 2,/* 0x2 */
DeviceUsageTypeDumpFile = 3,/* 0x3 */
DeviceUsageTypeBoot = 4,/* 0x4 */
DeviceUsageTypePostDisplay = 5,/* 0x5 */
DeviceUsageTypeGuestAssigned = 6,/* 0x6 */
};