The method preserves the rendering portion of the graph whenever possible. However, if you add or delete a group, or change the order of the groups, ConnectFrontEnd deletes the rendering portion and your application must rebuild it. Interface Not implemented. Interface Not supported. Interface Not implemented.
Interface Retrieves the filter graph that the render engine has constructed, if any.
It receives the value NULL if there is no filter graph. Be sure to release the interface when you are finished using it. Interface Retrieves the output pin for the specified group . Address of a pointer to receive the output pin's IPin interface. Group does not have an output pin.