How to fix problem with mouse controller (Y axis invert when look at the negative coordinate) ?

Development Programming & Scripting Blueprint
10

Sorry to reply again but I take time again trying to find a way and I think about something like that :
http://www.hostingpics.net/viewer.php?id=496890TheQuestion.jpg

But I don’t know what I have to put where I make the “Red ?” :’(

I think It’s almost there !