|Microsoft DirectX 9.0|
The GetZOrder method retrieves the z-order of a particular video stream.
This method is not currently implemented and returns E_NOTIMPL.
HRESULT GetZOrder( DWORD *pdwZOrder );
[out] Pointer to a value indicating the order in which streams will clip each other.
Images with larger z-values are always in front of images with smaller z-values.