IWMDMDevice::GetType (deprecated)
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This is preliminary documentation and subject to change.
This topic documents a feature of the Windows Media Device Manager SDK. We recommend that you migrate your application to use the Windows Portable Devices API. For more information, see the Windows Portable Devices SDK.
The GetType method retrieves the operations supported by the device.
Syntax
HRESULT GetType(
DWORD* pdwType
);
Parameters
pdwType
[out] Pointer to a DWORD specifying the device type attributes. The possible values returned in pdwType are defined in the following table. Microsoft recommends setting both WMDM_DEVICE_TYPE_SDMI and WMDM_DEVICE_TYPE_NONSDMI flags.
| Device type | Description |
| WMDM_DEVICE_TYPE_PLAYBACK | The media device supports audio playback. |
| WMDM_DEVICE_TYPE_RECORD | The media device supports audio recording. |
| WMDM_DEVICE_TYPE_DECODE | The media device supports audio format decoding. |
| WMDM_DEVICE_TYPE_ENCODE | The media device supports audio format encoding. |
| WMDM_DEVICE_TYPE_STORAGE | The media device has on-board storage for media files. |
| WMDM_DEVICE_TYPE_VIRTUAL | The media device is not a physical device. |
| WMDM_DEVICE_TYPE_SDMI | The media device can accept SDMI-protected content. |
| WMDM_DEVICE_TYPE_NONSDMI | The media device can accept non-SDMI content. |
| WMDM_DEVICE_TYPE_NONREENTRANT | The media device must synchronize access to Windows Media Device Manager services. |
| WMDM_DEVICE_TYPE_FILELISTRESYNC | The media device allows the file list to be resynchronized. |
| WMDM_DEVICE_TYPE_VIEW_PREF_METADATAVIEW | The media device prefers metadata views while its storages are enumerated. |
Return Values
The method returns an HRESULT. All the interface methods in Windows Media Device Manager can return any of the following classes of error codes:
- Standard COM error codes
- Windows error codes converted to HRESULT values
- Windows Media Device Manager error codes
For an extenstive list of possible error codes, see Error Codes.
Possible values include, but are not limited to, those in the following table.
| Return code | Description |
| S_OK | The method succeeded. |
| E_INVALIDARG | The pdwType parameter is an invalid or NULL pointer. |
| E_FAIL | An unspecified error occurred. |
Remarks
The current Microsoft service providers may not provide reliable information about devices, except WMDM_DEVICE_TYPE_NONSDMI or WMDM_DEVICE_TYPE_SDMI. All devices will be reported as supporting the former; devices that support serial numbers also return the latter.
Requirements
Header: Defined in mswmdm.h.
Library: mssachlp.lib
See Also