The MV Development contains an include file folder with all filter interface definitions. To use the filter interface in your own project you have to include the mv.h include file from the include directory. The include files contains some GUIDs for the interfaces and filters. To get an instance of these GUIDs you have to use the initguid.h from the Windows SDK. Include the initguid.h file before the mv.h file in one of your implementation files (*.cpp).
Sample:
#include <initguid.h>
#include <mv.h>