Microsoft DirectX 9.0


The GetDDrawObject method retrieves the DirectDraw object being used by the Overlay Mixer filter.


HRESULT GetDDrawObject(
  BOOL *pbUsingExternal



[out] Address of a pointer to the IDirectDraw interface that the Overlay Mixer is using.


[out] Pointer to a variable that receives a Boolean value. It receives the value TRUE if the Overlay Mixer is using a DirectDraw object specified by IDDrawExclModeVideo::SetDDrawObject, or FALSE otherwise.

Return Values

Returns an HRESULT value. Possible values include the following.

Return code Description
S_OK Success.
E_INVALIDARG Argument is invalid.
A DirectDraw error code A DirectDraw error is encountered when trying to set the specified surface on the Overlay Mixer.


If the filter graph has not set a DirectDraw object and the Overlay Mixer has not yet allocated one, then pDDrawObject will be set to NULL and pbUsingExternal will be set to FALSE.

See Also