How can I scroll my panel using my mousewheel?

Question

I have a panel on my form with AutoScroll set to true so a scrollbar appears automatically.

How can I make it so a user can use his mouse wheel to scroll the panel?

Answer 1

In my case, the whole client area of the panel was occupied by UserControls (not a single pixel of the inner area visible, except the scrollbars).

In this case the panel doesn't get the mouse-events and will never focus (apperently, clicking on the scrollbar does not count as "being inside the panel").

I had to add the following lines to the constructor of my UserControl derived class:

MouseEnter += delegate {
   Parent?.Focus();
};

Now it works fine, as I have no scrollable content in the UserControls.