Creating Custom Effects and Transitions in Windows Movie Maker
Not quite happy with the supplied transitions and effects in Movie Maker? Well for all you developers out there, you can create your own custom effects and transitions for use in Windows Movie Maker. Just check out the following article in MSDN which supplies all the lovely details.
https://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwmt/html/moviemakersfx.asp