This is actually, in my opinion, a very weird happening. I have a c++ program that stretches an image in the entire window and then draws that same image at normal size whereever the mouse moves.

It works great and fast if I have another large program open like VS. But if I just have dev and the program running the drawing is slower than C# is.

But C# remains the same.

Is there something that .net does that my little c++ app does not that could cause that wierdness?