|Microsoft DirectX 9.0|
The CheckTypesSet determines whether the media type has been set on all of the streams.
Returns TRUE if the media type has been set on all of the non-optional streams. Otherwise, returns FALSE.
Call this method after any operation that changes the media type on a stream. This method sets a private flag within the class. Some IMediaObjectImpl methods test this flag to determine whether certain operations are permitted. These methods generally return DMO_E_TYPE_NOT_SET if the flag is FALSE.
The only two methods in IMediaObject that change the media type on a stream are SetInputType and SetOutputType. The class template implements both of these methods.