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Enabling PnP for Windows Media Device Manager Devices

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Windows Media Device Manager monitors arrival and removal notifications of devices that advertise a Portable Audio Player device interface. On the arrival of such a device, Windows Media Device Manager queries a device parameter named WMDMSPCLSID for the class ID of the service provider responsible for this device. Windows Media Device Manager calls IMDServiceProvider2::CreateDevice on this service provider to create a device object. This object is then exposed to the application as an IWMDMDevice object.

For a device to work with the preceding mechanism (and thus enable arrival and removal notifications for the device under Windows Media Device Manager applications), the following requirements must be met:

  • The device driver of this device must advertise the Windows Media Device Manager Portable Audio Player device interface. The GUID for this device interface is defined as: { 0xf33fdc04, 0xd1ac, 0x4e8e, { 0x9a, 0x30, 0x19, 0xbb, 0xd4, 0xb1, 0x8, 0xae } }

    Note   A device should not advertise this interface if the device advertises the Volume Interface (VolumeClassGuid as defined in ntddstor.h, which is available in this SDK). If the device advertises the Volume Interface, it is already PnP-enabled under Windows Media Device Manager.

    -AND/OR-

    A new registry subkey for the service provider must be created inside the subkey HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Media Device Manager\KnownDevices. This key should have the name of your service provider and must have the following two Reg_SZ value entries:

    DeviceInterface             {25DBCE51-6C8F-4A72-8A6D-B54C2B4FC835}

    WMDMSPCLSID             {067B4B81-B1EC-489F-B111-940EBDC44EBE}

  • The device must have a device parameter named WMDMSPCLSID. The value of this parameter should be set as the CLSID of the service provider in string form. For more information about device parameters, see Device Parameters

    Note   The parameter value must be the CLSID, not the ProgID of the service provider.

  • The service provider for this device must implement the IMDServiceProvider2 interface.

  • The service provider key under HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Media Device Manager\Plugins\SP\<SPName> must contain a DWORD value, PnPAware, which must be set to 1.

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