CM_Reenumerate_DevNode function (cfgmgr32.h)

The CM_Reenumerate_DevNode function enumerates the devices identified by a specified device node and all of its children.


CMAPI CONFIGRET CM_Reenumerate_DevNode(
  [in] DEVINST dnDevInst,
  [in] ULONG   ulFlags


[in] dnDevInst

Caller-supplied device instance handle that is bound to the local machine.

[in] ulFlags

Caller-supplied flags that specify how reenumeration should occur. This parameter can be set to a combination of the following flags, as noted:


Reenumeration should occur asynchronously. The call to this function returns immediately after the PnP manager receives the reenumeration request. If this flag is set, the CM_REENUMERATE_SYNCHRONOUS flag should not also be set.


Specifies default reenumeration behavior, in which reenumeration occurs synchronously. This flag is functionally equivalent to CM_REENUMERATE_SYNCHRONOUS.


Specifies that Plug and Play should make another attempt to install any devices in the specified subtree that have been detected but are not yet configured, or are marked as needing reinstallation, or for which installation must be completed. This flag can be set along with either the CM_REENUMERATE_SYNCHRONOUS flag or the CM_REENUMERATE_ASYNCHRONOUS flag.

This flag must be used with extreme caution, because it can cause the PnP manager to prompt the user to perform installation of any such devices. Currently, only components such as Device Manager and Hardware Wizard use this flag, to allow the user to retry installation of devices that might already have been detected but are not currently installed.


Reenumeration should occur synchronously. The call to this function returns when all devices in the specified subtree have been reenumerated. If this flag is set, the CM_REENUMERATE_ASYNCHRONOUS flag should not also be set. This flag is functionally equivalent to CM_REENUMERATE_NORMAL.

Return value

If the operation succeeds, the function returns CR_SUCCESS. Otherwise, it returns one of the CR_-prefixed error codes defined in Cfgmgr32.h.


If the specified device node represents a hardware or software bus device, the PnP manager queries the device's drivers for a list of children, then attempts to configure and start any child devices that were not previously configured. The PnP manager also initiates surprise-removal of devices that are no longer present (see IRP_MN_SURPRISE_REMOVAL).

Callers of this function must have SeLoadDriverPrivilege. (Privileges are described in the Microsoft Windows SDK documentation.)

For information about using device instance handles that are bound to the local machine, see CM_Get_Child.


Requirement Value
Minimum supported client Available in Microsoft Windows 2000 and later versions of Windows.
Target Platform Desktop
Header cfgmgr32.h (include Cfgmgr32.h)
Library Cfgmgr32.lib
DLL Cfgmgr32.dll

See also