| Microsoft DirectX 9.0 |
The OnDataChange method notifies the client when the video rectangle's aspect ratio or size, or the display palette, has changed.
Syntax
HRESULT OnDataChange(
ULONG ulDataFlags
);
Parameters
ulDataFlags
[in] Flag indicating which set of data has changed. The following flags are defined.
| Flags | Description |
| MIXER_DATA_ASPECT_RATIO (0x00000001) | Picture aspect ratio. |
| MIXER_DATA_NATIVE_SIZE (0x00000002) | The video stream's native size changed. |
| MIXER_DATA_PALETTE (0x00000004) | The video palette changed. |
Return Values
If the method succeeds, it returns S_OK.
See Also