IWMBackupRestoreProps::SetProp method (wmsdkidl.h)
[The feature associated with this page, Windows Media Format 11 SDK, is a legacy feature. It has been superseded by Source Reader and Sink Writer. Source Reader and Sink Writer have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use Source Reader and Sink Writer instead of Windows Media Format 11 SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
[SetProp is available for use in the operating systems specified in the Requirements section. It may be altered or unavailable in subsequent versions. Instead, use Microsoft PlayReady. ]
The SetProp method adds a property, and specifies its name and value.
Syntax
HRESULT SetProp(
[in] LPCWSTR pszName,
[in] WMT_ATTR_DATATYPE Type,
[in] const BYTE *pValue,
[in] WORD cbLength
);
Parameters
[in] pszName
Pointer to a null-terminated string containing the name.
[in] Type
Pointer to a variable containing one member of the WMT_ATTR_DATATYPE enumeration type. The current implementation of this method accepts only WMT_TYPE_STRING. Specifying a different type causes the method to return E_INVALIDARG.
[in] pValue
Pointer to a byte array containing the value of the property.
[in] cbLength
Length of pValue, in bytes.
Return value
If the method succeeds, it returns S_OK. If it fails, it returns an HRESULT error code.
Remarks
This method is used to set properties that are needed by the other backup restorer object interfaces.
The following table lists the predefined properties.
| Property name | Type | Description |
|---|---|---|
| BackupPath | String | Full path to the location where the backup files must be saved. |
| RestorePath | String | Full path to the location where the backup files can be found and used to restore data. |
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only],Windows Media Format 7 SDK, or later versions of the SDK |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | wmsdkidl.h (include Wmsdk.h) |
| Library | Wmvcore.lib; WMStubDRM.lib (if you use DRM) |