| Microsoft DirectX 9.0 | 
The SetAspectRatioMode method specifies whether the VMR will preserve the aspect ratio of the source video.
Syntax
HRESULT SetAspectRatioMode(
  DWORD AspectRatioMode
);
Parameters
AspectRatioMode
[in] Specifies a member of the VMR_ASPECT_RATIO_MODE enumeration type.
Return Values
Returns an HRESULT value. Possible values include the following:
| Value | Description | 
| E_INVALIDARG | Invalid argument | 
| S_OK | Success | 
See Also