// wdm.h

typedef enum _DEVICE_REMOVAL_POLICY {
  RemovalPolicyExpectNoRemoval,
  RemovalPolicyExpectOrderlyRemoval,
  RemovalPolicyExpectSurpriseRemoval
} DEVICE_REMOVAL_POLICY, *PDEVICE_REMOVAL_POLICY;
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Windows Driver Kit DDI reference (ne-wdm-_device_removal_policy)

_DEVICE_REMOVAL_POLICY enumeration

Description

The DEVICE_REMOVAL_POLICY enumeration describes a device's removal policy.

Constants

`RemovalPolicyExpectNoRemoval`

The device is not typically removed.

`RemovalPolicyExpectOrderlyRemoval`

The device is typically removed in an orderly fashion. (Before the device is removed, the Plug and Play [PnP] manager sends an IRP_MN_QUERY_REMOVE_DEVICE request to the device's driver.)

`RemovalPolicyExpectSurpriseRemoval`

The device can be removed suddenly. (The driver receives no advance warning that the device will be removed. The Plug and Play [PnP] manager sends an IRP_MN_SURPRISE_REMOVAL request when the device is removed.)

Remarks

The IoGetDeviceProperty routine supplies a DEVICE_REMOVAL_POLICY enumeration value when a driver requests DevicePropertyRemovalPolicy. The operating system uses the value as a hint as to how the device is typically removed from the computer.

DEVICE_REMOVAL_POLICY - NtDoc