A really interesting question!

[jesseoak]

Hi!
I've got two background pictures, one is blurry, the other one is the same picture, but more colorful.
The default background image is the blurry one.
When I move the cursor, I'd like to change the background image from the blurry to the colorful one,
but only in a circle around the cursor,
and when I move the cursor forward, the changed background stays where the circle around the cursor went earlier.
(like when you scratch a lottery ticket with a coin)
I think I have to handle the MouseMove event, and use the MouseEventArgs cursor position,
but I cannot go through, and I really need help!
Thanks in advance!