Version 19 of this C API has changed from version 18 as follows:
INVERTEDTEXTDLGPARAMS - The type of uStructSize member has been changed to L_UINT.
OPENDLGPARAMS - A flag has been added to uDlgFlags (DLG_OPEN_LOADCORRUPTED).
INITIALVIEWENUM - A flag has been added (DLG_VIEW_DETAILS).
For more information, refer to:
Direct Show .NET | C API | Filters
Media Foundation .NET | C API | Transforms