[Warning: UMDF 2 is the latest version of UMDF and supersedes UMDF 1. All new UMDF drivers should be written using UMDF 2. No new features are being added to UMDF 1 and there is limited support for UMDF 1 on newer versions of Windows 10. Universal Windows drivers must use UMDF 2. For more info, see Getting Started with UMDF.]
The AssignDeviceInterfaceState method enables or disables the specified device interface instance for a device.
HRESULT AssignDeviceInterfaceState( [in] LPCGUID pDeviceInterfaceGuid, [in, optional] PCWSTR pReferenceString, [in] BOOL Enable );
A pointer to the GUID for a device interface class.
A pointer to a NULL-terminated string that contains the name of the instance of the device interface. This parameter is optional. The driver can pass NULL if the driver does not have to supply a name. If the driver must supply a name, the string that the driver passes must not contain any path separator characters ("/" or "").
A BOOL value that specifies whether the device interface instance should be enabled or disabled. TRUE indicates to enable; FALSE indicates to disable.
AssignDeviceInterfaceState returns S_OK if the operation succeeds. Otherwise, this method returns one of the error codes that are defined in Winerror.h.
If IWDFDevice::CreateDeviceInterface succeeds, the framework automatically enables and disables the interface based on the device's PnP state.
Use the AssignDeviceInterfaceState method to disable and re-enable a device interface manually.
For more information about device interfaces, see Using Device Interfaces in UMDF Drivers.
For a code example of how to use the AssignDeviceInterfaceState method, see IWDFDevice::CreateDeviceInterface.
|End of support||Unavailable in UMDF 2.0 and later.|
|Minimum UMDF version||1.5|
|Header||wudfddi.h (include Wudfddi.h)|