| Microsoft DirectX 8.1 (C++) |
This topic applies to Windows XP Home Edition and Windows XP Professional only.
The putref_TuneRequest method specifies a TuneRequest object to be associated with this Service object.
Syntax
HRESULT put_TuneRequest(
IUnknown* punk
);
Parameters
punk
[in] Specifies the IUnknown interface of the TuneRequest object.
Return Values
The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.
| Return code | Description |
| S_OK | The method succeeded. |
| E_POINTER | Data cannot be read from or written to a supplied address. |
Remarks
The actual TuneRequest object is stored in the database, because simply storing a pointer to its IUnknown interface would be meaningless. The storage mechanism obtains the IPersistStream interface of the TuneRequest object and then calls OleSaveToStream to write the binary image of the object to the stream. TuneRequest objects are small enough to make this feasible.
See Also