| Microsoft DirectX 8.1 (C++) | 
The QueryPreferredFormat method retrieves the object's preferred time format. This method implements the IMediaSeeking::QueryPreferredFormat method.
Syntax
HRESULT QueryPreferredFormat(
    GUID *pFormat
);
Parameters
pFormat
Pointer to a variable that receives a time format GUID. See Time Format GUIDs.
Return Value
Returns one of the HRESULT values listed in the following table.
| Value | Description | 
| S_OK | Success | 
| E_POINTER | NULL pointer value | 
Remarks
The only time format supported by the base class is TIME_FORMAT_MEDIA_TIME (100-nanosecond units).
See Also