MP1-4100 : Rework Refresh Changer by rework Win32 API on C# and Win7 API on C++ side. It fix issue on multi screen setup and also GPU#1 / GPU#2.
MP1-4100 : Use DX9Device DeviceName and not the one from MP current screen position.
MP1-4100 : Updated dshowhelper to add capability to disable Vsync correction and MPAR correction. (owlsroost patch) Also modified VMR9.cs to match and handle the logic if we use Win7 or Lower and if MP is start on primary screen.