|Microsoft DirectX 9.0|
The SubpictureStreamsAvailable property retrieves the number of subpicture streams available in the current title.
[ iStreams = ] MSWebDVD.SubpictureStreamsAvailable
Returns the number of available streams as an Integer.
This property is read-only with no default value. To query each stream for its language attribute, first call this method to get the upper bound.
Stream numbering is zero-based.